I'm always on DRG when I'm in this dungeon, and I'll almost always use the LB on the Guardian. One time the healer laughed at me when I did it because he had never seen it done before. I just explained that sometimes I get a group that doesn't understand the fight or whatever, and it's easier to just do it rather than die. When the dungeon was new, that was standard procedure. I just haven't gotten out of the habit.