Well, once more it depends on the pull I should think. Typically I check it against the number of mobs I'm pulling, since the AoE emnity generation skills have both a range and target limit. On most pulls, not a problem, but it can still be a case-by-case basis. This is especially true it you're a lower-level, less geared tank running a dungeon with a fully kitted out 60 healer since their Regens can tick some damned strong emnity generation if it's on all the party and even more so with a Medica II. I'm not saying one shouldn't do it, I'm just saying one should be aware of when they can get away with it and when they can't.