Originally Posted by
Floortank
Knowing how/when to deploy mitigation, which ones for which pulls, is a little bit trial and error. If it wasn't, every tank (player) would be equally as good, and they're not. Many don't even know what a powerful mitigation tool Arm's Length is. Many don't know that you put up Rampart or your 30% as soon as you get to the end of the pull because that's when the most damage is incoming. There's simply pressing buttons, which is better than not mitigating at all, and then there's having an actual mitigation plan that makes sense for the mobs you're fighting and the skill level of the healer/DPS. That's last bit is not a layer of ability that is just inborn at level 30.
EDIT: And I'm humoring you because I like your question and the other guy was so causelessly rude to you.