Fix paladin. Only Class in the entire game that cannot...

[Shurrikhan]

This is starting to sound like the stack-parry argument. Thinking that Clemency is keeping your healer in Cleric is a hypothetical. your healers DPS output depends 99% on that player, 0.9% on the weather, and 0.1% on you. Healing I've got a set opening DPS rotation and stance dance that either used or not. You Clemency mid-fight is hardly going to factor, more-so now than 2.x with Tetegration and Essential Dig. At worst you are going to have me waste it and at best I'll toss an Aspected Benefit / Regen refresh / Adlo that I otherwise would have not.

If you were:
1. ONLY doing AoE
2. Your healer had significantly better AoE than you
3. Your stacking parry saved more healer dps than it cost you

Then yes, stacking parry would be good. But, we don't only AoE, and at 3 mobs or less we do fine off GB rotations, and parry just does not scale well enough to have those effects.

I'd personally call it practical rather than hypothetical because it occurs for me, consistently if not identically, in the vast majority of my Expert roulette runs, from both PLD and AST/WHM perspectives. AS a PLD, if I would have needed a buffed Aspected Benefic shield, a swap to Aspected Benefic regen, ED, and then three Benefic IIs and another Aspected Benefic regen over the course of the fight, I can forgo two or all of the Benefic IIs with two Clemency casts, allowing for two additional Gravity casts. This happens identically, given similar healer ilvls and my using the same CDs in the same pull, across multiple healers. The only time I see truly different results are with a SCH, in which case we may choose not to pure AoE, and I tend to use Clemency only as he needs to reset DoTs for Bane. Otherwise, since much of the SCH's dps is already tied up in his pet (essentially regen but without the front-loading), I'll often get better results GBing key targets and reducing damage taken over the course of the pull through successive kills. TP and MP are obviously additional factors. I'm not saying Clemency heals = Healer dps stands as a rule of thumb, but it is my primary finding across hundreds of runs if one plays to the finer factors involved.