User blog comment:Enriant/Heaven and Hell/@comment-26982641-20160602075639/@comment-26271908-20160606202209

Castiel had fully recovered his Grace at the time, which means he was back at Seraph-level strength. Broken wings do not alter the power of the Angel unless he is a low-ranking. Seraphim have powers even when disconnected from Heaven, and the only thing that a broken wing takes from a Fallen Seraph is the ability to teleport. Castiel was not weak at the time. Tamiel overpowered a normal Seraph. Grigori were, in Castiel's own words, a class of elite angels