Tier list!

[RiceisNice]

When you make a tier list, you make it for a specific game mode, as class potential varies based on the nature of the game. For example, a WAR by far the best tank in Solo Queue while PLD exceeds it by leaps and bounds in premade. Most games have similar formats of separate tier lists.

Well there's only really one mode that's worth talking about at the moment.

Also, when I said "potential vs effectiveness" what I meant was that it seemed OP's list was developed with a one-sided match in mind, especially in the sleep department. In a perfect condition, a WHM would have to use FOUR GCDs to use up all of the enemy team's purifies. In a game where it is very possible to kill someone in 2-3 GCDs, sometimes even 1 GCD under certain conditions, those GCDs not being used for healing is extremely risky, and often detrimental. This was obviously not taken into account when OP made the list.

Your example would be held against WHM where there's a lot of outgoing damage, and they realistically shouldn't be spending those GCDs on CCing. Even that aside, WHM is probably the best at handling those situations where there is a lot of outgoing damage, too. Sacred prism is exclusive to them, their group healing surpasses AST in range and potency (assuming the ast is Diurnal) and is more sustainable than SCH (whom has limited options to begin with due to aetherflow).

If there wasn't that factor of outgoing damage, then WHM is still fully capable of CCing through repose and fluid aura, something that the other two healers lack.