The only viable endgame healer left in the game is Breton.

See HatchetHero's data here. He has properly controlled tests and the most stringent, properly adjusted data available for this PTS. For one thing, he's the only person besides myself that I've ever seen make the adjustments necessary to remove human error and variations in critical hits across tests. He also properly controlled testing conditions to fairly assess Breton and Khajiit, whose passives require certain adjustments to test properly (blue food, crit normalization). His analysis is the most data-backed information you will find on these forums.

As with the dynamic between Altmer and Dunmer in Mag DPS being lost to Breton, the competition between Breton and Argonian for Healing is also lost. Diversity is lost on BOTH fronts. The exact opposite of what the balance update was meant to achieve...