Here's what I think we can learn from AST

1. Don't destroy identity, potencies and actions playstyle and flavour, then lie about it unless you want to turn off 95% of everyone who plays it for 2 years.
2. Add reliable ogcd windows in to the job in order to have smooth play.
3. If the healer must be weak and have no damage, they need something to fill the gaps when no healing is required.

WHM is desperately in need of ogcd windows, not SCH. Sch can simply use ruin 2, and while a potency loss for the hysterical parsing high end toxic raiders, for the mast majority of the population its an excellent tool to get a gcd in

I would prefer WHM to get the sch style. Perhaps Water or Quake. Or better still Water AND Quake so it has aoe windows as well.