Light based damage spells.

[Alkimi]

but I haven't tried much to make holy do more damage (I'll have to equip my mab earrings next time and see how much that raises the damage).

Using Beyond as your 3rd Atma which I often do on WHM since there's not that much useful after Allure and Minikin, fully charged Holy does somewhere in the region of 1700-1800 damage with good nuking gear.

Holy II (The version mobs use anyway) is significantly stronger than regular Holy, doing around 3x the damage. If they did introduce it I fear it would be toned down somewhat or not affected by Afflatus Solace, or you'd have WHMs throwing out 5-6k spells.