I could be wrong, but I checked the wiki and it looks like Level 9 priest spells don't include a healing spell of any kind. Bit of a letdown for dedicated healers like me. I know I could take meta-magic feats to slot something, but it seems like, following the progression of every other spell level, level 9 should have Regeneration and/or Greater Restoration get boosted to "mass" as the pinnacle of healing magic for a priest.
No big, just a suggestion.
