Delta over UA for sure if you're going to be commuting.

UA's seniority based jump-seating sucks, their reserve rules aren't as good, etc.

If IND is a long term priority I'd stay at SWA or go to DL and maybe try for FedEx when they hire again. IND 767 FOs simply don't work on reserve. (50ish hours a year max). Or go to DL and be a 717 captain in DTW.