SCH needs some nerfs

[Deceptus]

I'll give some suggestions.
Increase the healing power of 'Assize,' and move the Damage it does back to another ability, keeping WHM's PPS the same while allowing WHM to use Assize for healing purposes. Let's say, instead of 300 HPot, it's 440 HPot.
Also move the MP restoring function of Assize onto another ability. Either put the same 10% MP recovery on another 1min-cooldown ability like Tetra, or reduce the cooldown of Thin Air.
Buff Divine Benison to 20%, making it about as strong as Lustrate to Tank.

Doing these things would put WHM in a more AST-like and SCH-like position where they are able to focus their OGCD heals to prevent healing GCDs from being necessary.

At the cost of making their healing kit better, I would remove/completely modify Plenary Indulgence into a raidwide Damage buff of some sort, theoretically equivalent in balance to Chain Stratagem.
At the cost of having a raidwide damage buff, make their Personal Damage equivalent to Scholar.

Having party-wide damage buffs makes it so that later in the expansion, WHM does not fall behind due to scaling of damage for healers vs scaling of damage for DPS. (Info about that in a previous post on this thread already.)
These are just some quick brainstorms of how I would change WHM to bring it up to AST's level.

Or allow Fluid Aura to give back some MP as it's useless normally.

Allow Lillies to act as confession stacks and make WHM the AOE heal king.