Ok, this is my first build so be rational please with ur comments, ect.

right, lets get straight to business. I have recently started playing akali again due to her being such a good champion, but this build is purely for AA and AS not really for her AP Skills but they still do help such as her Shadow Dance allowing you for an easy gank then her Crescent Slash sweeping all near-by enemies for a huge amount of damage and if you do catch then with your Mark of the assassin, it will allow your 489 AD + the bonus of the mark you put on the enemy. Enjoy the awesome feeding.

I have chose the:
Greater Mark of Alacrity
Greater Seal of Strength
Greater Glyph of Alacrity
Greater Quintessence of Strength

For a boost in the AS and AD needed for this build to be complete.

I do apologize for the short description on the runes but i could not think of any more information to put in.

The reason for the pure offense is because when you choose to do this option in your masteries it will help you out really badly since it will help stack your critical chance + damage to help along with your infinite's edge and phantom dancer. Alacrity will also help with your phantom dancer and Black cleaver due to its help with the attack speed.

I have picked:
Infinite's edge
Black Cleaver
Phantom dancer
Blood Thirstier
Beserkers Greaves
and natashors tooth

due to the whole reason of this build being purely for AD and AS with your AA (Damage 489 at 18) (and around 2.00 AS)

I have picked the skill sequence since you do need your Q and E all the time and i do fine most of the time without her W, but if you do think you play better with her W near early game, then by all means go ahead and change it to your own liking. (remember, this is only a guide for you.)

I have picked ghost and exhaust for Akali due to her speed at level 18 (490.59) and when you use ghost that should boost it up to around 560 and when you are in those situations where they may be faster than you such as people like Teemo who have speed boosts all around, you can use exhaust and use your W and slow then right down for an easy kill.

This build for Akali allows you to deal astonishing amounts of damage with her Q,E and R as well as your AA, I have recently tried this build with Akali and have got none less than 30/1/3.
If you do not believe me, try for yourself.