Many people seem to build Akali AD now instead of AP but AP is the way to go for me and maybe just you too. For the point of this is to stop having people going hybred when AP can easy just rape with barely any AD in it since your passives with your spell vamp and extra magic dmg.

For runes i get magic pen for sure since im all AP here and you can get your first passive with spell vamp from durans blade. Then at lvl6 of this you get your second passive without any AP items woot there some easy passives there if going mid makes it somuch easier for kills and lvls just make you somuch better there since need to be lvl6 quick.For hp runes theres not much othere choices theres dodge chnace that you dont need for her energy you wont need since u get energy easly back rom your q so hp is the best choice i say but theres otheres you could get if dont want some extra hp.

Now for masteries your both dmg from AP and AD so why not bring out both of theres powers out there with a few extra chances for easy crts and why not add some arrmor for the heck of it that can always help in fights easy when you mid or you know how to jungle with her.

I always start with a durans blade for my first passive then get my boots for those pesky runners or you wanna escape too. Then for some easy spell vamp a revolver always helps with some AP and spell vamp right there easy 30% spell vamp woot lets get all your hp back there now. Now lichbane i get for easy killing on turrets and easy escapes with more speed u can get about 600 dmg easy with all the items you got so far i about lvl 12 since you get a extra abot 40 somthing in AP about now so easy dmg with lichabnes passive but always when making it sheen irst for its passive when close up. now you want alot more AP dont you well of course you do well for added more normal dmg with lichbane with your AP and now more dmg with all your abiltys for more fun.Now about your team is always doing team fights and you like being alone wolf well spell vamp time then finsh your hextech then then and lets start making that othere one now for more spell vamp there and life steal there woot you can be at 100 Hp now and go to redbuff or blue and get it all back woot now you can stay longer at there base.Now I personaly like alittle more AP and dmg together and make it stack up more with rabbonds passive still going you can get some more easy ap with your now rageblade reason you dont need early its a item that helps only alittle bit realy you need all this othere AP first tobad rageblade dosnt make your spell vamp higher when its stacking.

Pros.
1.About this build easly can carry team to victory with all your dmg you can dish so quickly.
2.Great for jungling even if you know what your doing.
3.Best hp regenerating with all your spell vamp.
Cons.
1.Your still squishy with AD dmg sadly.
2.Oracles can ruin you easy when you need to escape.
3.Just dont play Akali if you dont know how to in real games plz.