Shut her down pre-6, after she hits 6 you got like one minute to make your move, after that, consider yourself as good as dead if you're in <900 range from her.What's going on with Akali?
Her burst is facking amazing :S
On mid I harass her as much as I can and ask for an early gank and just don't fuck it up and get an early kill or two on her. If you manage to get as ahead of her that she's just as afraid of you as you are of her, then you're in a good position.
Also ward all the possible exits so you can tell other lanes she's roaming or she'll just feed off them.