Original League of Legends (LoL) Thread

Trying to tighten up my Mostly-AD Ezreal build, my early itemization costs too much, and once i have it, there's really not much I can ever think to build after. Mostly the problem early on is my mana regen, I'm trying to figure out a way to sustain how ridiculously spammy I am with Q/R. Here's an outline of more or less what I've been trying, minus mana regen:

I used to play a lot of Ezreal, and after trying several builds, what seemed to work the best was Manamune, merc threads, trinity, BT and the 2 remaining slots on defense.