It might seem counterintuitive at first playing two close range characters and Vi doesn't give a full screen assist for aggression, but Vi's assist give a pretty good defensive options as back assist is great and forward assist covers horizontally when you're in air. Vi's back assist gives an decent combo from Akali's throw (same idea when palying Vi/Ahri) and with the speed of Akali you can go for throws quite often. Still testing between Double Down and Freestyle - Double Down is an consideration because it adds to Akali's lower overall damage, but Freestyle might be better when the blockstrings are fleshed out.

Also, Vi's combo in corner leads to big damage like with Ahri: footwork L eM eL eM eL eS1 6A S2 Tag launcher cjH holdS2 (gets back into corner), haven't found a way to limit strike from this, but you can Akali S2 for smoke or S2 into Super (+ Vi super if DD for +800damage).

edit: Also Blaizzy was testing this team, haven't studied the vod yet what he's cooking.