Arcanist to Scholar is a great suggestion. My main was originally a WHM and after switching to Scholar the pace feels much faster. Not only do you have a lot of off GCD cooldowns, but you are able to manually control your fairy outside of your casting and GCDs. If you like healers, but want a "faster" paced option this is a great one.

I do agree that Arcanist is somewhat painful to level. I personally did not enjoy it.