Why dont multiple sch shield stack?

[Inflorescence]

You say that, but even when I crit for 3000 the shield goes down...

This is mostly true in dungeons, and in fact I was just talking to my friend about how I basically DS->Regen, then just DPS for most dungeon pulls. But MP management is an enormous part of WHM gameplay, and Medica II is one of the most MP-intensive spells we have (beaten by Holy and Raise, I think), so we can't just keep it up 100%, like we do with Regen.

In addition, DS takes two Regens to come off Cooldown. Also, if you have a WHM, try to see how long you can survive using just Regen, you seem to feel like it's a higher potency than it is. It's not really a healing spell so much as a comfort zone while we cast our real healing spells.

Regardless, Galvanize is still "reverse Regen," in that the damage negation still comes, it just comes before the hits instead of after.