Our group after you left kept having shitty runs at Oryx because our bombs would not detonate and we'd lose 1-2 people every single detonation phase. Ogres would freak out and target people for no reason, I even died in the invincibility bubble once. I was right in the middle of it with plenty of witnesses, just dead for no reason. Shade randomly murdering people in midair, knights shooting after they despawned, Oryx starting the 'artillery' phase early.
After I took us back to orbit and re-entered it was much more manageable. Bombs detonating on time, etc. Still took us a while but we got it down.
I do think the other strat would be fine and much safer. The problem with the 'easy' strat is it's very risky and tons of things can go wrong - mostly related to adds not moving as expected. But unless your runner is AMAZING they will occasionally get screwed over by ogres.
People, myself included, just need to learn where (and when) the light-eaters spawn. Also I bet you can one shot them with a sniper if you're somewhat over 311, I was almost doing it at 310.