The thing that sends WAR's healing over the top is the ability to get crit heals imo.
One of the cooler design decisions of WAR is getting to spend infuriate for guaranteed crit heals when you need them, I kinda wish this was baked more into WAR's mits as a whole. Get the fatter HP regen when using stronger attacks and weaker attacks dont heal nearly as much, it make it a cool balancing act of pooling resources for a burst vs spending for more immediate health.

But at the same time just getting crit heals randomly is pretty strong, like imagine if the other tanks just could at a random change have a mitigation that was 2x more effective.
Dont know what I'd change about this, if anything but its something to note.