I have an air cavalry army that is similar. I am still adjusting it to the new vendettas though. It used to run veterans with demo charges in the vendettas. Obviously can't do that any more. I was using scions in the vendettas but I think I will adopt the command squads.
I really enjoy playing the army but I don't think it has ever won a game =D Although my meta is the opposite of yours, I regularly see 100+ models on the other side.
One thing I do is put Priests with my units that start on the board so they won't run off the table first turn.
The army basically has to have a good alpha strike since once your air cav has deepstruck almost anything can charge and kill them. I also use Straken as my warlord so my entire army isn't just rolled over in h2h and the fearless bubble. He is expensive though.