I just don't think you can compare this far into the tier, literally about all bosses has gimmicks to it or people can cheese it by multi targetting. All people can say about it right now is how well you do compared to your own raid, and personally I can keep up with most people. Some classes do shine on literally all the fights, but that's not that case of buffing us. But bringing them down in line with us
Edit: In terms of 5.3 I think we've been fine. The question is if we'll scale worse than the other classes coming into 5.4. Which could be the case, I dont know. Havent checked into it