AI have no teamwork? I think you must be newbie. AI always walk together one..
Once i played with AI 1 v 5 they level 1 first creep push tower already down.. Thats not teamwork? Somehow you know nowdays AI version been improved . when some tower being attack they will put signal 1. You could try 1 v 5 type greedisgood also and buy your best item, you'll see AI item are super geng 1 lol. You will learn what item to buy when you are rich from AI.