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With the release of Pulsefire Ezreal, a lot of players have been picking up Ezreal and trying to learn him in time to prepare for the day they can play with the skin. I've come across a lot of these new-Ez players and their builds ranged from full AP to full AD to hybrid and everything in between. I was intrigued by two popular options however. It is widely known that Ezreal (along with Corki/Urgot) is one of the best users of Trinity Force among AD carries. It comes as no surprise then that a lot of these new Ez players rush a Trinity Force and forgo the traditional Infinity Edge rush. My curiosity was piqued and I had to get the math done behind this to see how much damage you stand to lose by rushing Trinity Force. So I present to you - Ezreal: Trinity Force vs. Infinity Edge.
Abilities
Ezreal has 4 abilities which scale off AP and 2 off AD. It stands to reason that the AP from Trinity Force would help him quite a bit in terms of damage output. Let's take a quick look at his ability set for reference.
Now having gone through his abilities. The next logical step is to take a look at the item builds in question.
Items
So cue the item descriptions:
The official LoL website fails to show all of Trinity's information in one box. They are missing the mana/health components in the above picture but more importantly Trinity Force also gives the following passives:
Unique: Your basic attacks have a 25% chance to slow your target's movement speed by 35% for 2.5 seconds.
Unique: After using an ability, your next basic attack deals bonus physical damage equal to 150% of your base Attack Damage. 2 second cooldown. Does not stack with
Sheen or
Lich Bane.
That's a fairly straight forward description. An important note is the critical damage increase which will play a significant part in our calculations to come.
Assumptions
Now in producing the contour plot (rainbow graph), on the damage output increase that Infinity Edge gives over Trinity Force - a set ability combo is required. Having the advantage of foresight and being the author, I can tell you that Infinity Edge far outweighs Trinity Force in terms of damage output. So in the interest of showing data values where Trinity Force can hope to match up to Infinity Edge - these are the assumptions:
- Ezreal has no runes and masteries equipped.
- The only item he has built is a Trinity Force or a Infinity Edge.
- His spell rotation consists of QWER, i.e. he uses every spell once.
- He lands 5 basic attacks in one trade.
- The bonus damage axis is any damage that is not IE/TF.
Important Note: Since the bonus damage axis does not take into account any damage apart from the IE/TF, you would have to take into account Ezreal's base AD, runes and other items to read accurately. So at level 18, you would have to look at >101 bonus damage (assuming no extra items) and at level 1 >50 bonus damage due to your base AD as well as extra bonus damage due to runes/masteries. The graph has been designed this way so results can be read off for various points in the game. Bonus damage values from 0-50 are effectively impossible to hit values and should be ignored. They are in the graph simply to provide an axis starting from zero.
The Results
Conclusions
Even after trying to give the edge to Trinity Force by limiting the study to a small number of basic attacks, including a full QWER rotation and numerous sheen procs. It is painfully obvious that the Infinity Edge is significantly better damage wise than a Trinity Force. It is important to note that an Infinity Edge also scales any other AD you might have due to the critical damage increase. Having said this, I would strongly recommend not rushing a Trinity Force first for damage purposes unless you absolutely require a bigger mana pool or the utility from the slows and MS increase. However that is my opinion and you are free to disregard it if you wish.
I hope you guys enjoyed a return to some serious mathcrafting after a period of absence of rainbow graphs. Please do leave a comment below on anything that might have passed through your mind while reading this :) Cheers :D
If you enjoy reading the article - I'd really appreciate you clicking the up arrow - thank you in advance!

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Posted 6/20/2012 10:30:00 PMwhy would you drop 4k into an item that makes your laning stronger but falls off once the game actually starts? this post has convinced me that there is no reason to build a TF. UNLESS you build an IE immediately afterwards like you should on corki. that would actually make sense, because then you are boosting the damage of the TF by alot with the IE crits, and then relying on passive for some atk spd, while still have the advantage of phage in lane. Id have to look at his base atk speed to actually know if this would be optimal, but on corki it is optimal from the mouth of chaox. ill have to test on Ez bc no one good plays him really at all.
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Posted 6/20/2012 3:44:25 AMI think this article is a bit misleading since early game the only source of crit chance you would have would be from the Infinity Edge itself, meaning that only the left side of the graph is relevant since it's highly unlikely you'll be criting more than 2 out of 5 auto attacks. If we only look at the 1 crit column, the most realistic one, we can see that the damage increase is marginal at best (~150 damage). The calculations also disregard the attack speed gained from Trinity Force, which makes the difference even more marginal if even existent.
Weigh this marginal damage increase against:
+250 health, making you less squishy and helping you live through fights.
+250 mana, which is really useful on Ezreal early game. More spells = more damage.
+12% movement speed, letting you escape, chase, and dodge skillshots more easily.
On hit slow which works on your Q, letting you chase and kite.
Composed of cheaper items that work well individuality meaning that you get the biggest bang for your buck each time you B.
I'd much rather have all this than the marginal damage increase I would get from rushing Infinity Edge. Instead, I'd build Infinity Edge later since late game is where it really shines since it scales with bonus AD and crit chance.
That's just my take on it, though.
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Posted 6/20/2012 3:38:16 AMI'm interested in knowning whether or not you took into account the fact that Ezreal's Q procs Sheen/TF and then immediately applies the damage. Its more important for AP Ez with a Lich Bane as every 3 seconds you get to hit someone with a Q that applies 100% AD and 120% AP. For AD Ez with a TF it means that most Qs hit for 250% AD and 20% AP.
I know you were just testing raw damage in a straight up fight, but Ez's main usefulness as a carry comes from the ability to move around a lot and continue doing damage with Q and high attack speed.
Also you didn't seem to take attack speed into account. Ez's passive increase his attack speed makes crit damage and chance important, and TF gives 30% attack speed. I think you are better off looking at how many autoattacks you can get off in 5 seconds with both items to see if there is a difference.
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Posted 6/20/2012 2:03:52 AMActually I really prefer getting TriForce before Inf. Edge cause of the little but impressiv constant Sheen boost + the lane dominating Phage slow. This Phage is securing or even enabling me soooooo much kills on lane and it allows me so much constant harrass if its combined with Sheen so that I still would rate TriForce much much much higher on Ezreal then the Edge. Hitting someone with your Q - getting this Phage prog. - will nearly guarantee a Sheen proc AA on the target and this Poke really hurts! E+SheenAA+Q+AA+W+SheenAA = really huge burst with MS+AS slow its just amazing to see how scared your opponents are after this. And dont forget that Ezreal gets Bonus AS after using a ability which also synergizes quite comfortable with the % amount of AS increase through TriForce.
For me Triforce is just THE Item for Ezreal, or metioned in the comments Corki. There is nearly no way to avoid building it, or at least parts of it in the early stage of the game.
Pure mathematical DPS doesn't mean, that he really do more damage cause of the TriForce utility I would bet he can get more AA on his targets then with an Edge. And don't forget that the TriForce makes you atleast a little bit "tanky" which IE definitly doesn't.
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Posted 6/20/2012 12:05:34 AMTriForce can be built from more smaller pieces than Inf Edge, and being able to pick up _something_ each time you go back will help you out a lot more than waiting it out for the big stuff. Yes, in the ideal world you'd come back with 1650+ gold, but that doesn't always happen, especially if you are not dominating your lane.
Also, who is going to let you get 5 auto attacks on them before mid-late game teamfights? Early game is all about poking, especially as Ezreal. With two AAs + Q/W + 1 sheen proc (a quick lane exchange), I bet TF outdoes IE. Not to mention the phage slow and TF move speed allows you to actually kill people, where with IE they can just run away. As well, that extra health is great on squishy Ez. And where's attack speed in this calculation? You should be comparing times instead of simply the number of hits.
Anyway, I do get IE first if I'm dominating my lane, and there's no doubt that IE is a great item for outputting damage. However, if I am not doing so great, I'll pick up pieces of TF and combine them later for the cheap cheap cost of 300 gold.
TLDR: TF is more than just AD/crit chance; of course ignoring 60% of what it does will make it seem like a terrible item compared to IE.
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Posted 6/19/2012 11:05:00 PMYeeeeeeeeeey. This makes me wonder if Trinity Force rushing is good on Corki and for how long.
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Posted 6/19/2012 11:58:21 PMNo its not. Because the Sheen proc does not benefit from his passive or armor shred. As a support I want to kill any AD carry of mine who tries and rush Triforce.
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Posted 6/20/2012 12:01:57 AMSheen (as well as Lich Bane and Triforce) does physical damage, it does benefit from the armor shred.
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Posted 6/20/2012 12:25:52 AMSheen proc benefits from both his passive and armor shred. Corki has the greatest synergy with Trinity Force of any champion in the game. He requires mana to exchange, doesn't need to stack Doran's for health instead of a Phage because he doesn't need the life steal as he doesn't autoattack quite as much, he has low cooldown spells that time well with procs, he has great autoattack animation, he has armor penetration, he has hybrid damage.
That said, Trinity Force doesn't have to be core every game, but it's amazing depending on playstyle.
The entire strength of Trinity Force isn't damage per second, it's burst and poke in trades. It's not used to make you autoattack like a monster, it's there so you can time attacks with spells to trade and essentially make every trade a guaranteed crit. However, that's just the Sheen part, the rest of the Trinity Force is largely useless for trading, as Phage+Zeal's goal is to allow you to chase down people after out-trading them. The AD carries that focus on trading and can use the stats of the Trinity Force are Ezreal and Corki, and Corki benefits from the entire Trinity Force while Ezreal does not (built-in AS steroid instead of ArPen steroid stacks this difference even farther).
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Posted 6/20/2012 7:36:08 AMArmor shred yes, passive no, try it yourself if you don't believe me.
Both Tri-force Corki and IE Corki are both pretty good. Although nowadays I see more pros going IE (then again, pros also farm close to twice as fast as an average player... so they can get the items needed to make the IE build more damaging faster).
That said I'd say Ezreal synergies even better with sheen/triforce than Corki. Corki still needs to get within 550 range to auto attack for the proc while Ezreal's mystic shot applies the proc.
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Posted 6/19/2012 10:45:34 PMExcuse me good sir, but allow me to retort your findings with a few graphs of science.
http://imgur.com/GYsSb
http://imgur.com/JE94L
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Posted 6/20/2012 3:21:33 AMEasily the best math around. If anyone is reading this - please start a petition to get this guy his own blog.
:P
I lol'd
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Posted 6/19/2012 10:03:36 PMI think Triforce on Ez will always be the best option, not only for the mana/MS/slow utility you get, but the fact that you're not going to be an all out auto attack mode with Ez... Q is the foundation of his kit and I think Triforce is the perfect item to compliment it.
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Posted 6/19/2012 9:57:50 PMI never get tri force on carries. Only ever on bruisers. Didn't even have to do the math to know the large diff of damage between the two items on ez.
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Posted 6/19/2012 9:35:50 PM"It is widely known that Ezreal (along with Corki/Urgot) is one of the best users of Trinity Force" *record scratch* uhhh tri force is a common item on urgot? Haha but seriously, this article broke my heart. </3