Board Thread:General Discussion/@comment-6810329-20160911021344/@comment-25536775-20160924033512

S+: All deities. We don't have enough information to be able to declare that there is significant variation of power amongst them.

S: Sorcerer, All DOs!Rumpel

S-: Dark Ones, Emma

A+: Zelena, possibly Ingrid as well

A: Regina, Cora

A-: Anastasia

Peter Pan's power varies according to the state of magic in Neverland, as was said in 3x09, so it's not quantifible. Elsa and Cruella have only very specific forms of magic. And we simply don't hve enough information to infer anything on Maleficent's and Ursula's power levels.