Quote Originally Posted by Tiggy View Post
Something as simple as this could work.
D - You beat it, but barely.
C - You beat it with some wiggle room.
B - Above average.
A - Well Done!
S - Holy crap that's some Deeps! (or whatever mode you're in)

So for tanking it could be based on how much you mitigated.

Thoughts?
It's not a bad idea. It's always my thought that if a person can improve their maximum output, they'll definitely be better at handling other situations given they keep the same efficiency.