Honda 2000 generators in parallel questions....
I kept both of mine in Eco mode for everything. Never had any issues with the AC. I would power the generators and let them warm up a little bit before you put a load on them though.
Keeping them in Eco mode will allow them to idle back more when your AC is cycling off as well.
2015 XLR Nitro 30FQSL
2015 F250 King Ranch