My personal advice - Don't depend on AMR for a future.
They've failed that test REPEATEDLY over the last 10 years.
No guarantees at Comair due to timing, but if I was a betting man, with your worthless 3.5 years, it's a no brainer.
At Comair you could be flying the same 70-seater as a new-hire and your 2nd year pay would equal your 5th year pay at Eagle.
The rest of the bennies and work rules at 2nd year match 5 th year at Eagle.
As far as upgrade goes, count on another 5 years at Eagle. Comair should be no more than that.
You should have learned by now not to listen to the AMR violins promising a desirable future.
Garbage.