I didn't have trouble until my usual group went off to play other games. We were beating the whole raid in ~45 minutes each run at reset. Doing Oryx the only was he should be done, BY KILLING KNIGHTS. Then they left for other games and since then I've tried running with randoms and even with some of my group members and a few randoms. Out of 4 weeks now, I've come across TWO groups that have known how to pull the trigger with a sniper twice to kill Knights. Every other group I've tried with has refused to do the normal strategy and kill Knights. Each and every time that has ended up with us trying Oryx for 2+ hours and never completing it. DO KNIGHTS AND YOU'LL HAVE NO PROBLEMS.