I think a far more easier strat like this is to have everyone weaken the ogres then as soon the runner finishes on the platforms you all jump up to the daughter's platform (the one opposite Oryx) and stun him. Then you all finish off the ogres and jump down and detonate then meet at the usual bottom middle to shield from the detonation.
It's far easier than the OP's strat cause you don't have to try to coordinate killing the ogres at the same moment because they're already all low on health. And being on the daughters platform is much less chaotic with a better view of all of the ogres.
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Or you could have one man with a spindle deal with every ogre. Just saying that's what I did.
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This is what my team did