Instant abilities being regen and benediction, so we have somethings to cast and move. Cure isn't really that slow so you can get a few off while stopping and moving if you need to.

Make use of your subclass abilities, Eye for an Eye is instant though short range, if you need to protect someone and move, and swift cast can get you either an instant raise, or an instant cast Cure II while on the move.

Make use of medica II (since demon wall has no threat) and regen and you should be fine and hardly need to use cure on demon wall. Demon wall is actually easier for most WHM from what I've heard from the scholar community (I'll be trying it out on my scholar soon so I may have feedback to say otherwise) but our regens are awesome don't discount them.