In Reply to Aoirchan, you bring a valid point to the table. I myself end up auto attacking alot more then 30% of the time. I dont have cd reduction so its not like i can spam anything else but my shadow dance and even then after three consumed marks its up to your auto attacks anyway. With my attack speed i find my self criting at all the right times. Even if its not a consistant crit after crit its still an extra burst of dmg. So all in all 23% say 25% rounded up means every 4 attacks im critting and with my 31% attack speed increase i think its easy to see why i have that lil bit of crit in my gun powder. As for my ability build, i have not run into any problems bursting even the most armored tanks, even without being maxed by lvl 12. Granted 1 of my abilities usually gets maxed around those lvls anyway. I did it like that more to show what abilities to max first.

whats with your masteries the increased critt really isnt needed on akali at all..
since with it you only have a 23% critt at end and you only do melee attacks maybe 30% of the time so you really will rarely ever critt. Also you wont have any skill maxed till lvl 12? which means you wont really be doing that much overly large burst damage till then

Wow man good build. Looks like something that would ks the **** out of a Nunu on your team. Good job bro.