Guitar ->- Tuner ->- OD 1 ->- OD 2 ->- Axe FX front input.
Axe FX out #1 left XLR to FOH.
Axe FX out #1 right 1/4" to Combo front input.
Axe FX out #2 left to Pre-amp--Eclipse input
Axe FX in #2 left to Eclipse output
GRID:---Wha--Wammy--Drive1--Drive2--Flanger/Phazer---Delay--FX loop\---Amp--Cab (panned LEFT)
* * * * * * * * * * * * * * * * * * row 2 * * * * * * * * * * * * * * * * *\------Volume block(panned RIGHT)
This should give you what you're asking for??? I don't like reverbs or delays in front of amps, but that's just me. Have you tried doing all of this inside the box? You could still monitor it on your combo.
Lose the external effects. I had a gmajor 2 the axe fx effects are as good if not better than the ones you listed. Use a powered FRFR speaker (like xitone powered wedge) for your on stage feedback and monitor off output 2. Lose the external amp. I play live as well, what you describing seems like a lot of hassle, complicated, and potential for lots to go wrong. You should be able to get some good tones or even tone match your external amp as sound as good as if not better. Definitely in a live situation no one will be able to tell the difference.
I tried to hang on to my tube amp, using the axe in the 4cm effects only method for a while. In the end I got a better tone and a lot less to haul and setup by being open minded and not being too attached to my old gear.
With all due respect, the gmajor sucks. The eventide's reverbs and delays just sound better (to my ears at least). Eventually sooner or later i'll go for smaller and simpler setup, just not yet!