Man, I'm usually pretty lenient when it comes to raiding, but the DPS needed for oryx almost requires 295+ with snipers if you're going to make him stagger. I played 6 hours today with a lower level group, and we only got him to the final shootout once (and wiped because my group didn't know he'd reappear). They left and I got in a group with 295+ people with snipers and we beat him second try, could've done it the first time but I made a silly mistake. The fight isn't that difficult, but you've got to have the synergy that comes from experience and good DPS.