i will go on the items right away
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alright so to start with you will build a amplifyingtome and a health pot a great start , and if you get firstblood go get hextech revolver right away it´s the best item for akali in begin and when you´ve got the hextech revolver get mercury´s tread they are the best boots for akali in game beacouse of her runes which i will get on to later ! then you´re getting your main item the rabadon´s deathcape its simply the best item for a ap char..and when you have completed the rabadons you can complete the hextech revolver to a hextec gunblade , the passive is really great on it, and it´s just great 300 dmg extra in a fight its really good but when i play akali i usually forget the hextech but that´s something you need to train on to get a better player, okey so lets move on to the lichbane.. it´s one of your main items to even if it go mana it doesn´t care beacouse the passive makes a really good combo with your Q attack and everything else on it is just great.. okey so we are coming to the end almost... now i´ve made some recommended items but relax ! beacouse it depends what team you are playing against if you are meeting a team full of ap build the abbysal scepter ofcourse !! and if you´re meeting a ad team the hourglass ofcourse.. and if you´re meeting both of them then buy both but if you are meeting just one of them just build the item ap or ad... and buy a rylai´s scepter instead.. ! so we are done with the build right now ... but we got some runes also.. okey so lets begin with this right away ! :D
okey so this is the runes

Greater Mark of Insight.. so lets begin with the magic penetration rune... it´s a really good rune for akali beacouse she does not have any magic penetration items ! and it is really effective in begin of the game and in the end also.. !!

Greater Seal of Warding and the magic ress rune to, if you are meeting ap ofcourse but its good in the begin to beacouse almost every champ have some kind of magic dmg attack !

Greater Glyph of Focus and here is the cdr rune it´s really great for you cuz its the same as the magic penetration you got none cdr item, which is really good beacouse you need some cdr on akali for a better nuke !

so lets move on to the quintessence

Greater Quintessence of Insight this is just more magic penetration 2 of them it´s so good in begin so you have no idea.. !!

then we got the last quint...

Greater Quintessence of Fortitude a flat hp rune for little more hp in begin !

and this was my akali guide i hope you like it , it works really fine for me ! thanks alot and thumb this guide up please ! thanks !