After having spent quite a while as a healer main, I've decided to give tanking an attempt. I've leveled MRD to 15 and completed my class quest in addition to getting a nice set of tank gear, so I think I'm mostly ready to handle Sastasha. I'm just wondering if there are any common mistakes I should avoid, any cross class abilities I really should have (for MRD or GLD, I'll be leveling both), or just anything to keep in mind leveling as a tank.