Epoch → EOP → Gauntlet
Always go in order of most rewarding to least
This is good but EPOCH is hard on revives and has 6 paths
OP has already finished Gauntlet, so I would recommend to do
ORDEAL → EPOCH → EOP
I suppose the caveat is that it's all relative to your skill level (and how the AI feels like treating you that day)
Epoch completion.
Ordeal completion.
Epoch exploration, at your pace.
Forget EOP, I did eop to target some 6*s from all the nexuses.