Its best to use him last and use his hurricane kick assist. I combo I found with Sent and his is. LP,LP,Rocket punch while calling Akuma assist, then Lazer breath rocket punch go into Sent kick super. There are tons of combos you can do with Akuma assist.

I think this is his best combo. LP.LP.D+fp. LP. LK. hurricane kick then fireball super.

A team I like to use is Sent Cable Akuma . I like this team I think Akuma assist can work with anyone though.

Use cross ups with him and do combos, its not that easy to trap him also because he can teleport. If they try to super jump with you then uppercut so you get above them.

And always use him last.