Basically this clear shows two things and you can argue both or neither of them are a problem

A lot of this healing was done with clemency on top of things like veil and intervention. However this use of clemency doesn’t actually affect the tanks as much as you’d expect. Firstly tanks do 30% or so more damage than healers and there is quite a bit of downtime they used clemency in. So the tanks spamming clemency still did more damage than all but the best 8 AST’s in the world.

So the problem becomes “if you can clear an ULTIMATE spamming clemency why does a skill like seraphism or neutral sect exist?”

The healer kits are hilariously overpowered for the outgoing damage and the tank kits are just strong enough to cover such a significant portion of the damage which leads to encroachment

The fix here is going to lead to tank nerfs, either directly or indirectly. Tank kits should not cover the amount of healing they do. You can either directly nerf tank kits or you can up damage (which indirectly nerfs tank kits) but regardless this should be impossible without 2 dedicated healers. The healers have other problems that also need to be fixed in their design but for this clear specifically the tank healing options relative to damage is what allows this to be possible so it either needs to be directly or indirectly nerfed. Healer kits are stupidly overpowered and should have been nerfed 4 expansions ago but like I said this clear more represents the mismatch in tank/healer healing and outgoing damage than anything else which a fix is inevitably going to nerf the tanks whatever happens to the healers