User blog comment:Eman4evr/Thinking of doing my provisionals. Advice?/@comment-5670872-20140226214206

I don't play much Master Yi, but I give you this (from watching some High-elo games on YouTube):

1) Teamfights: Don't go in headfirst, wait out a bit so that most important CCs will be used on your team. You're one of the damage dealers, not tanks. Jump in when you can get their MVP. But if your team is going to lose without you, don't wait too long or you'll throw the game.

2) Build: DON'T EVER BUILD FULL DAMAGE. It's better to invest 2-3 item slots for defence, then to be evaporated every teamfight. For MR I recommand Maw of Marmoltilius (however it's spelled, that's the sword with magic shield anyway) and armor: either Randuin's Omen or Frozen Heart. Or both (Carried game on 3v3 against enemy team: Tryndamere, Lucian and Katarina. Still lost because if was 2v3 from the start. But it still was fun :-] ), especially if enemy team is AD/AS heavy. You can also swap FH for Thornmail if you see fit, which I think is better on Yi since he's not CDR reliant.

I like going: Mercs/Tabis; Yonmuu; BotRK/Hydra/BT; Randuin/Maw; Randuin/FH/Thornmail (if took Maw before); IE/defensive item (don't feel like listing them again, there are too many options).