User blog comment:Enriant/Heaven and Hell/@comment-26982641-20160602075639/@comment-26271908-20160608015852

It was never said the spell affected their strength. Actually, the only thing that is noted is their power to teleport that is gone with the wings. One of the many plot holes is that low-ranking angels lost their powers after they fall in the beginning. Right now, they seemingly keep everything else aside of teleport and, possibly, time-traveling. But, no, I cannot recall a single moment when an Angel became weaker than they were originally after they fall in Season 9

But, yes, I really didn't remembered that Tamiel was feeding on souls. So, yeah, I was probably wrong. I think they would be in the level of Seraphim, as they were still recognized as elite warriors, which means they must have some sort of power at least above normal Angels - I'm really complexed by the fact that, after entire eleven seasons, the full extent of Heaven's and Hell's Hierachy was not explained yet. I mean, I'm not asking for spenting a full episode explaining it, but just giving hints of information so we can play connect-the-dots with them would work really well