I don't think Rage stacks with Oath of desecration.
The man at arms talent you've mentionned are kinda strong but Weather the Storm doesn't allow your warrior to go over the 80% soft cap in resistance (rubies!), and Thick Skin is something like 25 armor (better to just sacrifice the talent to get armor abilities if not maxed?)?
I was wrong my apologies, Oath of Desecration does nothing if used with Rage, just tested it. My understanding of stack does not conform with the game.
