Which 6* should I awaken?

Awakening my first 6 star agent. Need some suggestions. I'm thinking to either kitty or cgr.

Comments

If you're good at Kitty, go with her. If you use CGR often enough and want a really nice Fate Seal, go with him.

KP or CGR

I would go with Kitty. Once you learn her rotation, she's basically a cheat code for the entire game.

Also, which of above heroes are good to go for Act 6.2 and above ? I have maxed 5 star Kingpin, now got a 6 star one, should I focus on 6* now?