first of all i know it s very hard to set up like this but you will buy faerie charm and kill unşts and champins for gold than set up your champion full atack than if you catch sb he will die and i forget boots but you will buy berserker's boots.
Secondly when your team was fighting you must come behind and kill them with alpha strike then you must use r skill to catch sb who is trying to escape than you must hit with your heavy damage everytime i did this and all my opponents trying to escape but i killed them with my speed.
İ know it s very expensive but i believe that if you are yi you can afford them whenever i played master yi ı always buy 4 infinity edge so ı m unstopable.
İ know ap yi is good but if your skill ıs closed what the hell can you do?
ı hit them 400 with out skılls so there is problem about my skılls.