I'm not generally in the habit of giving people career advise, because it will probably be wrong, but I will tell you what I would do, if I were you.
1. Take the upgrade. TPIC is TPIC, nobody in my experience cares about the number of crewmembers (maybe they do in India, I don't know).
2. I wouldn't judge airline jobs by upgrade time too much, upgrade times change (in either direction) and change quickly.
3. If you're specifically after the E-170 (which is a great airplane), you may also consider Skywest and Envoy.
4. I would avoid Endeavor. They're going through tribulations I would rather not be a part of.