its not just ur server, sainted. Its MOST servers. most of what enkidoh said is perfect. Only thing I would tweak is that off-tanking is a lil more stressful as you are focusing on the battle as a whole, not just the boss. Flipping between your oaths (shield when u want more aggro/damage redux; sword when you are helping to dps the boss in your \\'down time\\'), checking for add spawn, etc. Little stuff like saving circle of scorn until you need to pick up adds, using cover on the main tank and then popping hallowed ground to mitigate ALL physical damage for both of you (right before the table flip titan does, for example) are just fun things you can do to make healers\\' lives easier.
all in all, as long as the healer only has to heal YOU ur keeping aggro. If youre keeping enemies facing away from the party they dont have to dodge as much. And if you sidestep aoes, your healer wont have a stroke. At that point you are ok, and everything else is finesse. good luck to you!