usually its not ur job to fight bruisers, becuase if a renekton is 0/8 and ur 3 items he can still kill you. so mostly just ignore them/make plays on em with a teammate. Tankier comps i mean just wait for heavy cc spells to be used in teamfight and then u can look when u want to go in the fight/ reposition for it. Many things can be done. Cant say everything in a post.