Bad, Maneater, Frozen or Skullcrusher to 60 I'm leaning towards Bad, but I have no books for him. I just got him yesterday so still getting use to him. I do have enough gems to unlock all mastery though.

Frozen Banshee im in same boat with books. Only 3 on her so far.

Maneater is nearly full booked. Just missing last 2 on A1.

Skullcrusher is fully booked.