Got a new and vastly under geared DPS (lvl45 weapon and AF1) yesterday while doing the Sirius Pharos on roulette.
The other DPS went "fuck you noobs, kick me out" and when we refused he first went "then I'll go AFK" and then trained monsters on us as we were going on the stoopid stubborn marathon (he won, we kicked him out).
We then got some other DPS and we finished the DJ with some troubles (as he was new and had less HP than my fairy) but he was not playing that bad.
Each boss strategy was 1 or 2 minutes max. Dunno why some people got their panties in a bunch over those "bad" player.