“Main healer” and “Off healer” died off in HW, and I’d rather not see it return.
I’m a far bigger fan of healers sharing the healing responsibilities, not one being a main healer while the other just does DPS all the time.
AST isn’t in WHM’s shadow. It’s the other way around—WHM is in AST’s shadow and has been since Creator; because AST can do everything a WHM can, and it provides utility (which WHM cannot). Empowering AST’s regens would serve to make WHM even more unwanted in optimized groups, and it would honestly serve little purpose, as their healing is already fairly strong currently in Diurnal Sect (healing in general is overpowered in this game).
WHM is generally considered the “raw, pure healer”, and the devs spout that its “burst healing” is its utility; but there’s not enough outgoing damage in even the hardest fights to warrant the amount of burst healing that they currently provide. If a fight does 1 million damage, you only need to heal 1 million damage; WHM may be able to heal 2 million or even 10 million damage, but it’s all wasted after that first million is satisfied.
Between a SCH’s Deployed Adlo and an AST being able to mitigate 20% just about every other raidwide AOE, what would be the point in bringing WHM or any other healer? This suggestion breaks AST even further, and just makes it more meta than it currently is.
You’d have to give this a seriously long cooldown for it to not be completely broken—it’s already overpowered even if it did have a cooldown similar to Deployment Tactics, because now SCH/AST can plan to alternate shielding for several raidwide AOEs and reduce the need for more healing...which would defeat this idea of a “main healer”.
This would also further hurt WHM and/or a new 4th healer provided the 4th healer doesn’t have an answer to Balance. AST is so strong because of its cards, Balance in particular—it doesn’t really need them empowered further.
In higher end content, the CC wouldn’t be particularly useful, as most bosses are immune to slows. Personally, I don’t see the need for increased run speed, but that’s me. I tend to stand still in fights and only move for mechanics/if I have to.
I’ll repeat what I said before: giving AST more healing serves no real purpose unless content is changed to balance it out—i.e., things need to hit harder a lot more frequently than they do now. Right now, there just simply isn’t enough damage to warrant massive amounts of healing that HoTs can’t cover. Even in the hardest fights.
I personally don’t count “White Hole”/Cleansing Strike/“Reduced to 1 HP” type mechanics as decent healing mechanics; but that could be because the devs went a little nuts with them this expansion, and they result in more overheal usually than they should.
That said, AST already has an ability like this: Earthly Star. And it is ridiculously strong—750 potency AOE heal under Giant Dominance every 60 seconds that blows anything WHM can do out of the water. And it can be pre-planned and timed to blow up immediately after a raidwide, removing the need to cast GCD heals.
AST and SCH both already do both of these things: AST provides card buffs (and ways to manipulate said cards, either by spreading them to an entire party, increasing their potency, or by extending their duration) and SCH provides Chain Stratagem/Fey Wind. Both of them have extremely powerful heals: Indom is ridiculously strong and SCH’s are adored for their Deployed Crit Adlos; and AST has both Earthly Star and Collective Unconscious, the latter of which is the strongest regen in the game.
The only one that doesn’t have a type of utility is WHM, and that’s why it suffers. It only has raw healing, but the amount of raw healing it brings simply isn’t needed (except perhaps outside of prog—WHM is used a lot in Ultimate prog because of its healing and AST has MP problems...however, progging an Ultimate on AST isn’t impossible and very much doable; WHM is simply “safer”).