7. Then it is flat out overpowered compared to SCH/AST's tools. This is similar to boosting the current Cure III range to 15y.

8. I highly doubt they'd get used at all outside super-heavy mitigation requirements (Ultimate).

9. If you boost SCH/AST to compensate then the numbers are meaningless to compare with. Might as well buff/nerf everyone across the board. Assuming SCH/AST aren't buffed to hell to compensate, this is still a 1050 potency GCD AoE heal without any cooldown to speak of. Don't fall into the trap of thinking OGCD heals are always superior to GCD heals. What wins is the most efficient heal. The one with the lowest opportunity cost (DPS and cooldown). In practice, this heal would be more efficient than any AoE Aetherflow-based heal SCH has. Without any cooldowns to worry about. Any SCH cohealer with you would just blow every Aetherflow on Energy Drain or better, switch to SMN. This is overpowered. You really want WHM solo healer to be the meta, and to spam this one combo for every raidwide?

10. Lemme do some of the math and you'll see what I mean. Assume you have the perfect scenario. You pop this on a DPS right on their burst phase, and it effectively increases their damage by ~10%. Right now, a ~99 percentile DPS doing their opener will do around ~30k DPS. Add 10%, that's +3k over 10s, so about 30k damage total. A crit Broil III is ~30k, or around 420 potency. In the absolute best scenario, this deals 120 potency more than just using Fluid Aura. In any realistic scenario you're better off using Fluid Aura or even just waiting on Misery cooldown.

11. Just like fights are heavily scripted, optimal healing (and mitigation) is always well planned in advance. If you want something RNG you could give Glare/Dia a chance to give a Blood Lily charge, since that doesn't affect your healing plan.

12. It would be completely useless in 90% of fights. Until a boss appears which uses a buff, where WHM would completely trivialize the fight. This is a bad idea.

As for my ideas, well I have a Google doc, but I need to re-think some of the WHM stuff after review from a static buddy.