Vampire Scep + Wriggles Lantern -> (Phage if dying a lot) -> Hextech Gunblade -> Frozen Mallet -> Guinsoo's Rageblade OR Lich Bane
Some other items I've seen recommended were Sunfire Cape, Frozen Heart and Madred's Razors (if farming)
That is the build someone recommended to me not one I came up with myself. It is more of a jungle build but I use it in lane. I tried the standard Trinity Force build but found I was too squishy.