Forum talk:Neekerivittu/@comment-5756858-20130702184716/@comment-6301771-20130715224257

^ CURRENT. BotRK scales off of CURRENT HP, not MAX, which is why Zed gets such great use out of it: He initiates with his ult, weaves autoattacks into his combo, and since he dealt % health damage when they're high, his ult then explodes. People who think you only have to build straight AD on Zed don't really make as great of use of his ult: It works best if you can stick to someone (which BotRK provides), deal lots of damage (which BotRK provides at the beginning of a fight), and if you can afford to disengage when the mark will kill them (again, which BotRK provides).