I did say 'single target healing', AOE stuff like Medica, Lilybell, Assize or Asylum would not be counted. Solace, Cure2, Cure1, Tetra and Bene would be the only things that'd work, maybe Cure3 but only the primary target. And Bene could probably be an exception so it's not just thrown in for damage. I picture it less as a 'do more damage' CD and more like... damage recapture? So if you foresee a part where you have to heal a lot (Brute Justice JWaves or something) with GCDs, you can pop this and get, not Glare level damage per GCD, but at least more than the 0 we currently would have.
Imagine if one of the healers (probably WHM if some people here got their way) in PVP didn't do any damage to enemies, it was all about keeping your team alive with healing. It'd be horrible to play against, and horrible to play AS, since you'd be target number one to get absolutely disintegrated, CCd out of the game and blown up before you can say 'Why didn't Guard save me'. And it'd mean less burst potential on your team, since you're essentially 4v5 in terms of damage output. The more I think about it the more I hate it why do I do this to myself