While I typically don't see eye-to-eye with TiduZ, this is spot on. Power Word: Shield needed a real looking at, not a knee-jerk hotfix. This is quite a mess. For the time being the best quick fix is to revert the B&S change. Holy doesn't actually need PW:S spam like people adopted. Fixing Disc is more complex, but the main issue is that PW:S is too much like Flash Heal. It needs to be lower HPS and higher HPM. It needs to be something that can be tossed around, but not something that is clearly superior to your other spells.