hist bark is a waste for NB tanks. It's better used by classes that do not get major evasion as a class skill.
581 for argonian per second is a bit crazy. Not worked it out, but i guess other races will get roughly 300 per, which is twice as good as a slotted skill... that's 'ok' i guess, as you are consuming something to get that, not just clicking a slotted skill. Means tanks will be blowing through potions much faster than they currently do.
Any ideas if the additional -30% the caster gets is getting removed from bolstering? Also will that +8 seconds expire immediately when the circle goes, or is that addtional effective duration? too many questions that can only be answered by PTS...can't wait!