SKILS

I first go with Alpha Strike for easier farming. Then I max out Wuju Style ASAP, while choosing Highlander when possible and Alpha Strike when needed. I max meditate at the end.

Double Strike Great passive for this type of champion. 2x damage with 1k crits. Do I need to say more?

Alpha Strike Great tool for farming and

even better for catching your enemies. When maxed it deals 300 damage, which is respectable, since you get no bonus from ability power.

Meditate Usefull when maxed out to counter ultimates from champs like Karthus, since you get 300 Magic Resistance and Armor and you get healed for 700 Health over 5 seconds. But it's not worthy leveling up in the begining, because this is not AP Master Yi Build.

Wuju Style When maxed out it's passive is 35 more damage. When u activate it u get 70 damage. Let ur brain do the math :)

Highlander Awesome ultimate. Good escape mechanism, good chasing mechanism,...Let me just count the awesome things of this ulti:
-When maxed, 80% Attack speed boost for 12 seconds
-Immune to slow effects while active(Ashe's frost arrow, exhaust,...)
-If you kill a champion, while Highlander is active, your cooldowns reset, if you get an assist, your cooldown is cut in half.

Early game

Try to lane with champions that have root, stun or any kind of skill that can prevent enemies from fleeing the battlefield(slow can work too, I guess). After you have done that, peacefully farm and annoy your enemies untill you hit level 6 and get Highlander. Then you and your partner should annoy your enemies, so they hit about 1/2 life. Then your partner slows, stuns, roots(whatever he has) and you press E and R. Acording to the build you should get 40% AS boost and 50 extra damage. No way they can escape. Anyway, if they escape and you have pretty high health, u can use Alpha Strike and suffer those few tower hits(unless full health enemy champion is watching you and is like:"Hey, come to tha tower so I can stun you while u towerdive(Been there, done that)).

Mid Game

If you have succesfully killed your enemies on the lane, you can go freely kill some jungle monsters, maybe take blue buff or you can go gank. Pretty much your decision. If you are doing good, you should have Phage by now which should make ganking much easier. If you want to gank and you are not doing so great, you can grab Frozen Mallet sooner.

Late Game

Now you should have some pretty good items which will help you in all departments. If you are doing good just peacfully relax and push. If you are fully builded but still your team fails...Dont worry. Tell your team to distract enemies, while you go backdooring towers.