WHM using Misery in burst windows doesn't contribute extra to their rdps, instead it contributes to the rdps of the players providing the buffs.

WHM started off strong this tier because it's popular, easy to play and actually about as good as AST at healing now. Great job to prog with for once. But it's already slipping at the higher end as players acquire more gear and know the fights and is settling in the second last spot. It's simply tuned a little better than Sage, but still doomed to inevitably fall behind as the tier progresses.

The issue is raid buffs and always has been. Cards and Chain scale with gear and how well your group plays. Glare, Dosis, Misery and Phlegma don't. For some reason SE monitors this with dps and SAM and BLM are both strong and tend to receive buffs if they slip, but they absolutely refuse to buff selfish dps healers as the tier progresses.

Sage being labeled the "dps healer" and being terrible at dps is rather sad though.