These are only the reasons to my stat priorities. WHM stats are debatable and their importance are determined by the players preferences and play style. If you plan on putting the time into the Relic quest line you should figure out what yours are.

Note:
CRIT isn't generally a favorable stat for WHM since we already have large/strong heals. Over healing from frequent crits can cause dangerous enmity spikes. (1 dmg = 1 enmity, 1 hp heal = 0.5 enmity) While you can combat this with Shroud you fall into the possibility of wasting it when you need it later for MP regain while its still on cooldown.