Why are ranged using LB so much now?

[Radacci]

In more difficult content it might be advantageous to let a melee dps LB to get more damage output, but in most of the content out there it doesn't matter who LBs (of even if anyone does) so I say let the ranged dps LB, they don't often get to.

then i will use drk LB, cause i never seen it.