Bots are not as smart as human, so you pretty much have to make him impervious to damage while dishing out tons of it to farm efficiently. 1k armor and ar are not going to keep it alive in mp5. You're gonna need really good gears with (aside from main stat and vit) +armor, +ar, +% life, +crit chance and some crit damage....you can buy a piece like that with 80m, if you are really lucky.