Quote Originally Posted by Tenhou View Post
This is completely up to you and your own tastes.

Having two black princesses is really nice in all honesty.

People like me, however, will combine even the best blacks ever because we only want 1 of each unit. You seem like you do not care about this so go ahead and level double princesses.
This
I support Tenhou, i like a team to have differet units, whenever i need 2 of a single class i go with either different rarity or different unit of the same rarity (except when i need 2 calliopes because we have no other silver witch... i can handle going with chloris but for maps like War of magic where you need mincost silver witches... you get the point)

Even if could ever manage to roll a second copy of Sybilla or Nanaly i would combine thim w/o a question (Nanaly after CC for that skil up of course)

But that's my opinion, and the decision is yours in the end