Thx! I have the GR-55 hooked up to the Loop Return of the SY-1000 - so I can use the PCM sounds, along with the synth & effects of the SY-1000.
Most often, I'll lay down something and loop it using the EHX - then jam on top with the Axe-Fx.
But as you can imagine, possibilities are endless! I mostly use the HX-Stomp for the bass amps and as a super portable backup rig that I can just grab and run with to go jam with friends (when we still lived in a world where this remained possible...).
The OneControl loop switcher allows me to swap the order of the GR-55/SY-100, HX-Stomp and H9 - so that's super convenient!
Then that goes into the EHX looper and can either go straight into my interface and any monitors or to an input of the Axe (via the patchbay).
The MC-6 I use to control pretty much everything on the board. I have banks for the Stomp, H9, SY-1000, and can also use different midi channels to control multiple stuff at the same time - it's a very capable little controller, yet super easy to program.
Another use of the SY-1000 is the alternate tunings and 12-string/acoustic emulations, that I also sometime will run into the Axe-Fx. Using a Godin xtSA I can route a signal via the GK pickup to the SY (then to the Axe Input 2) and a regular cable to the Axe Input 1 - again possibilities are endless!!