I have been using her as leader for my B team. With her speed buff Old Daka hits early and often for some nice stuns. That gives stuns fro Daka, ASajj and Dooku. I am still new to the game and so this pairing may not work well for elite players.. but my current B team is Asajj Leader, Old daka, Talia, Dooku, Sid has been fun. Still leveling them all up. Have most at gear 7.
My A team is jedi team with
Ima-gun-di (literally "i'm gonna die") Leader
Lumi
JC
Ahsoka
Aayla
But yeah Asajj is fun and I like her look.