Are my mitigation numbers off ?

[Reynhart]

I mean in 2.0 WAR had the self-healing and that just didn't work for the way the game works.

I'm not sure that self-healing really didn't work.
The problem was that Defiance (by itself) was clearly weaker than Shield Oath. To be on par, you had to keep all your Wrath, but by doing this, you couldn't use Inner Beast...
So, basically, to use your self-healing, you had to withdraw your healing boost...
If WAR had kept the same self-healing abilities (And they're even better now with Equilibrium) AND their current healing boost, they probably wouldn't need that much "mitigation".

As for DRK, I really think it should have been more interesting to give them a "spike" stance, where each time you're hit, you reflect a fragment of the damage (20% and capped by your HP max) and leech for the same amount. Which would have also been their major mean of DPSing, so their personal skills would have their potency reduced, for balance purpose.