SCH concern on DPS. Healers dps comparison

[Hustensaft]

This is mostly the case.

For single-target. Multi target it's vastly different.

For simplicities sake, let's assume that Shadowflare, Assize and Earthly Star (all on a 60 sec CD) are similary potency spells and can be removed from the Equation.

In 24 seconds and 4 targets, the damage will look as follows:
WHM: 6200 potency
AST: 5712 potency
SCH: 2870 potency.

For Dungeons, you do NOT want to be a SCH if you want to provide any sort of meaningful damage to your party. The difference simply isn't just a few hundred DPS, it's signficantly more than that.