video
This is a video of ours, though this particular run has only 2 LNC I think? We
generally take 1 GLA, 2 CNJ and 2 ARCs minimum, but any other spots are fair game for any classes. I recall a run tonight for example with 2 ARC, 2 MRD and 1 LNC. The only benefit for ARC in this fight is shadowbind, if your DPS are any good they can parse as high if not higher than ARCs with little problem. Class stacking 5 ARCs really doesn't have huge benefits at all.
We tried it with one ARC, but we didn't change our kill order, so it wasn't that great. With only 1 ARC you have to keen flurry shadowbind which hurts your DPS, since you should be using it on quick knock. Then resists are a different matter on top of that. It was a bit sloppy all told. We have enough people that enjoy ARC that running with 2 is easy, so rather than adjust our kill order we just do that.