Yeah, it's the teleporting Ogres/Bombs. It's still possible to recover if you let the bomb get eaten, but all that is happening exactly when Oryx runs his stagger check and it's tricky.Why are people having problems doing CM? The fight is arguably easier if you do CM imo.
Also I've been convinced of Daughter Platform roaming DPS superiority. It's much safer to kill the Ogres from up there and then drop down when the brand arrives.
The key to preventing the Ogres from teleporting is overwhelming DPS. If everyone kicks in DPS then hits their respective knight it should be no problem. One of my attempts had a group of bombs get eaten (bad adapting on my part) and we still completed it on the first try with 5. When everyone is running high light level weapons the Ogres simply don't stand a chance.
Ogres must die before they even consider taking a step.