"As to the Balrogs durability we see a lightning blast destroy him after he was weathered by Gandalf who really demonstrated nothing really powerful IMO other than the lightning strike."
"The Balrog and Gandalf both survived but we've seen far less durability wise beat Gandalf the Grey."
"Powerful enough to ko a human or knock them back 15 feet or both. That's one example. That's more powerful than a Saruman push which defeated Gandalf in their pansy wizard battle."
Soo Gandalf demonstes nothing powerful besides the lightning charge, that with the falling-for-miles durability he still gets beaten by less, and that Gandalf gets defeated by attacks below the likes of 'ko a human'. By your word Gandalf has no feats above that of a human :T