I could see us getting Holy II and Banish IV soon... and maybe a cooler light damage spell at 99. SMN's LightSpirit is capable of casting Banish IV I think (I'm unable to confirm it, but I've heard of such), which would mean it's probably likely to be added.

WHM definitely lacks MAB, not to mention it doesn't even have the trait. WHM has to /BLM or /RDM to get the MAB trait (they're the same as both BLM and RDM get the 2nd tier before /45). MND and MAB boost damage further. It's been some time since I messed with them outside of yellow !! purposes, but I do remember more MND/MAB boosting the damage.