First, I will talk about runes and build. New conq is just really good on yi, lethal tempo is a good choice, but you really should use conq because of the amount of healing it gives you. Lethal tempo has a cd while conq does not. Try both, see which one you like, but I highly recommend Conq. Triumph, not much to say, just good overall. Alacrity vs life steal vs tenacity, Alacrity and tenacity interchangeable, life steal is meh, take it if you really want, but imo you don't need it. Coup de grace is just good. Last stand is also a good choice. Completely up to you when choosing this rune. Secondary, domination. Ravenous hunter is a must for the heal it gives. I could explain this all out, but its going to take forever. It basically heals of any on hit you have. YOur e true damage + wits end and rage blade = no die. Must have. Now, ghost poro right now is good on yi because of a "bug". What you do is you clear, then before you back, make sure you place 2 wards, then recall and switch to sweeper. The reason you want to switch to sweeper is because cd for normal ward is 180s. Sweeper is only 80s. So once your wards are on cd, switch to sweeper, then don't use it. Once its back up, switch back to normal ward and you will have two wards. THen place them down again then switch back to sweeper. If you do this, ghost poro will give you more ad quicker compared to eyeball collection. DO NOT TAKE SUDDEN IMPACT. IT IS REALLY REALLY BAD. YOU DO NOT NEED THE EXTRA LETHALITY. YOU DO ENOUGH DAMAGE. Getting flat ad vamps your e true damage, which is much better. Now for items. Always red smite, the dmg reduction and true damage is too good to pass. Skirmish + rageblade is your bread and butter. After, if they have a lot of ap, go for wits end, then either 1 def items into deaths dance, or deaths dance right away. If not , go rageblade deaths dance, almost always. If your behind, then go a defensive item after rageblade. Then later on, deaths dance.

What you want to do is start on your botside. Clear buff, into gromp/krugs, raptors/wolves, then do the other side full clear. Then either get scuttle top or gank top. Back, sell refillable for a recurve bow if you dont have enough. Go bot clear then go to dragon, get early dragon.