This is the way i play Master Yi for dominion. This build gives ridiculous attack speed, and when finished a lot of attack damage as well. Unfortunately it is pretty expensive, so don't expect to be finishing it.

I start off with Berserkers geaves, and 2 health potions. Then first chance i get i grab a recurve bow, and when possible turn that bow into the ionic spark. after that i get another recurve bow and turn that one into a sword of the divine. The combination of these 2 items applies about 200 bonus damage every 4th hit. i get a phantom dancer next because movement speed is SUPER important on dominion. Then to top it off, i add some attack damage. the order of the last 2 items is completely up to you. i like to start with the black cleaver because it also adds attack speed. then i follow that with the blood thirstier. Generally the game ends before i get my blood thirstier though.

This skill sequence is my personal favorite. I start off with wuju style because it has a very nice passive. Then i alternate wuju style with alpha strike unlit both are maxed. After that raise meditate until i am full level. I think think this sequence provides alot of early game dominance, and since establishing early control of points is the most important part of dominion i find this very help full.

that is my Master Yi Dominion build. I believe it to be one of the best ways to plan Master Yi on dominion. But be careful. This build leaves you pretty squishy. Generally you have so much damage output that you should generally kill your target first but, be ready to spend a decent amount of time dead.