Hello and welcome to A DIFFerent View. Today I will be talking about the two masteries in the offense tree, Havoc and Executioner. Both of these masteries increase your damage dealt by a percentage if you have them. I am going to assess the amount of damage these masteries could actually add to your output, and see if there are any other masteries worth taking instead.
First let's talk about Havoc. Havoc requires 8 points in the offense tree to begin taking points in it, and for each point in it you deal 0.5% additional damage with a maximum of 3 points available to put in it. This results in a 1.5% damage increase if you have the full amount of points in it.
So how much is 1.5% bonus damage? Well I can tell you its not very much. We can start at the low end and say you are a mid lane mage with 50 AD trying to last hit minions, this 1.5% damage will let you deal an extra 0.75 damage. If you're lucky that will round up to an additional 1 damage! Now let's say you've farmed up and you're a late game mage with the ability to burst someone for a quick 2000 damage. Well with the Havoc mastery, you'll deal 2030 damage! That's 30 whole damage! As you can see that 1.5% damage really isn't making that much of a difference. In fact, here is a little chart I made to show how much damage people would have to deal with the Havoc mastery compared to without against enemies with certain health.
As you can see, if you needed to deal 5000 damage to somebody, a person with 3 points in the Havoc mastery would only need to deal 4926 damage to kill them. I'm going to go ahead and assume if you have the ability to deal 5000 damage to somebody you are probably doing it as a team, and it probably wouldn't be too hard for an extra 74 damage to be dealt somewhere in that team fight.
Masteries to Take Over Havoc
Now I'm going to assume you are going 21 in offense to already be taking 3 points in Havoc. Now if you're a physical damage based champ going 21 in offense, I would guess you are taking something that looks like this:
If you are not taking something like this for physical based champions going 21 in offense, but you are still taking the Havoc mastery, I highly suggest you change it.
Now what is more likely, is that you are currently taking the Havoc mastery on mages you are playing. Your mastery page offense tree probably looks something like what's on the left, but I would suggest taking what is on the right.
The difference in the two pages is taking 3 AD over the 3 points in Havoc. This means as a mage you will deal 3 more damage to last hit with, this would normally not be achieved with Havoc unless you had 200 AD, which is unlikely for a mage. Also in mid lane armor seals aren't seen too often, so having an extra 3 AD can add a little bit of harass to your autoattacks.
Now we move on to the Executioner mastery, probably more often used than the Havoc mastery. It gives you 6% damage increase as long as your target has 40% or less health. One of the biggest reasons I here people take this mastery is for last hitting potential. so let's look at that:
So even at a low amount of AD this mastery helps you last hit as well as 3 points in Brute Force.
Now what about when trying to execute champions? I've made a chart similar to the last one but now its 6% damage and its 40% of the target's HP.
Now as we can see this is better than the Havoc mastery, and in the last column I even calculated how much damage it would take with both masteries, the difference is minimal. If you were a Lee Sin ganking top and the enemy was at 200 out of 500 HP, with the Executioner mastery you only have to deal 188 damage, 12 damage isn't a huge difference by any means, but the difference is you don't have a whole lot more you can compare it to. This is only one of your mastery points and in certain scenarios (your target having less than 40% HP) it is 4 times more effective than 3 of your mastery points. Also, at this point you've already taken 20 points in offense, meaning you can't use it anywhere beyond the third row of a different tree.
Really the only other option I can see that's potentially better than taking Executioner when you already have 20 points in offense is possibly taking 2 points in Transmutation and stacking it with Spellvamp runes, this would only be viable on certain champions, and maybe you could even take 3 points and go 19-0-11.
The other option is to not go more than 9 in offense. When doing masteries, take into account if you really need those higher end masteries like armor pen, lifesteal, and bonus ability power, if not you may want to consider going 21 in defense or maybe even utility.
Havoc is a pretty bad mastery to put points into. If you were in some best cast scenario you could be an AD carry critting for 1000 damage a hit and 3 points in Havoc would let you deal 1015 a hit. Executioner isn't that great of a mastery either but if you already have 20 points in offense for other reasons you don't really have many better options for only 1 mastery points. I would highly suggest never taking Havoc, and as for Executioner, just think whether or not you really value points in offense over another tree. I hope this helps you in the future and thank you for reading!
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