Since there are a number of people who leave regionals to go to Southern/Atlas I think you'll be adding a big question mark on your resume if you go from flying a 777 to flying an RJ. I never worked at Envoy, but I can't see it being a better QOL than whatever you have there myself.

If you're looking at maybe using the flow to get on with AA I guess that works, but if you're just wanting out of that rut I'd suggest trying hard with Spirit et al first. If you do go to an RJ operator, I'd guarantee that you'd be asked why you decided to do it and will need a good answer.

Really, PIC isn't as important now as it used to be. I think having heavy transoceanic time probably checks a few boxes itself.

All that said, if 777 F/O there pays less than an RJ captain, I don't blame you for wanting to run away.