Again, it's not about BLU's potency - they have very potent healing spells.

It's about BLU's MP efficiency.

4% on a back piece? 15% with a sword & a lucky genbu's shield augment? That still doesn't compare to a Surya's +2, which is much easier to obtain (22%). BLU can't wear Augur's Gloves fyi, so that really nullifies the backpiece argument as well. Can't wear Fylgia Torque either. Though I gotta admit looking at the list I'm rather surprised that DRG of all jobs can wear Roundel Earring but SCH & BLU can't oO;

Plus there's Rapture, SCH's naturally larger MP pool etc etc.... I'm not here to bash BLU, I'm just saying don't go making false claims about BLU being the #2 healer - that's just an absolute falsehood.