When gearing up a WHM, most players stack DET or spell speed as their secondary stats. These provide you with more consistent healing without the risk of overhealing that stacking crit on your equipment causes. The meta has shifted recently in favor of Determination since those produce slightly stronger heals while spellspeed is useful but also is less mp-efficient (requiring better mp management). I can't say whether this will hold once 2.3 and the battlegrounds pvp holds up, so feel free to experiment. I personally use a combination of DET and crit and it has worked out for me.

Anyway, you will want to mix and match your gear to focus on 1 or 2 of those secondary stats. Build up Myth and CT until you can replace the CT with allagan. The Vortex ring of healing from garuda extreme is also something to work towards as a whm. Also from the soldiery sections, consider the daystar accessories and gloves for bis.