Hai pplz this is my 1st build/guide, so cut me some slack ^^. This build is primarily for 3v3, but is also good in 5v5.

3v3: check to see if how many ignites and flashes the enemy has, if they have 3 ignites and your team doesn't have 2 or ore don't go for the team fight in the begging.

5v5:she's not the best mid, so when your up or down regardless, stay close to your partner. (try to pair with a tank or someone with a lot of hp.

Together Everyone Achieves More. Akali is great for hiding in the bushes, and just ganking sum1 or a team. If there is a Lee Sin on the other team, i reccomend not soling the top when your still doing lanes. In team battles your going to want to for (Lee Sin, if he's an enemy champion) the squishiest champ.

When your lane-ing your going to want to push the enemy back, far enough so they don't get any exp. you want to use "mark of the assassin" it might not damage them very much but on ur next physical attack they'll probably run back. By level 2 you should have got "twilight shroud"(the purple ball thing), throw it towards the back on their minion wave to throw the enemies in defense mode and hopefully back.

Akali is a very good ganker, although she is squishy, she's not usually targeted 1st but rather 2nd or 3rd.so hopefully you can take out their squishy champs, so your tanks can take all the damage for you while you just destroy them. >:D