Were you both high at the time? Because it looks that way.
Well it's their active mitigation but holy shield is apart of the rotation and rebout is a talent... Still they can't block all the damage they take (which prob warriors can't either)... They have parry and dodge as well so i don't neglect that as well as CTC
Well both has their good and bad... Considering if the MT get's attacked all the time you have ''infinite'' taunts... Which would make it better than righteous defense but that's a personal opinion... Last stand is more controllable CD then Ardent defender since well the 20% redu at 35% is nice but once the AD has procced well you can't rely on it anymore :P. I guess the same can be said about any defense cooldown i suppose. Still both tanks has easy rotation it's just that imo Warriors gameplay is more fun (subjective). Intervene can be really really good due to the intervene talent (30% reduce on the target that you intervene but also for removing movement effects due to talent)