Quote Originally Posted by Canadane View Post
Killing them faster with a ranged LB will keep them from doing more damage than letting them live with a tank LB preventing some damage over time.
It's he same reason dps is priority for all classes in the games meta as it is. You simply prevent damage by killing them faster.
That's only when you intentionally (and unnecessarily!) create more of a problem for yourself/your group by overpulling/multipulling, though. Yeah, you get things done faster if you pull multiple groups, but then if you burn an LB on a group of mobs, what happens if somebody screws up on the boss, you wipe at 10-15% and realize that LB2 could have finished him off if you had just saved it instead of burning it on a group of mobs right outside the boss's door? The time you saved by LBing the trash and overpulling is suddenly wasted by a wipe and rez and re-fighting the boss again.

*shrug*

I think using LB on Trash is just reckless and not needed.