Like others said, these days you might as well just not use the LB in raid setups, be they 8 player or 24. I've seen it happen way too often, if a DPS does use the LB, they tunnel-vision, fail to see that the healers would likely need it, end up wiping us, and then complain that "you shouldn't need to save the LB in normal".
Ok, I don't completely disagree, but it's not that hard to look up at the party bar and see that half the party are dead and the last remaining healer is about to run OOM.
If anything I prefer it be used during DPS checks, especially if you know how to squeeze the most out of it like an LB1-meteors-LB3 in O11N. If the party's performing adequately, the sustained damage dished out should be enough. If not performing adequately, in non-enraged situation, you probably want to save it for tanks or healers anyway.