If you're willing to break with skyteam for part of the trip, you could also consider ATL-DXB on DL and DXB-BLR on Emirates or Air India. At least with this routing you get an upgrade-eligible DL flight for the bulk of the trip.

As I'm currently debating between this routing and a ATL-CDG-BLR routing for a trip this summer, I'd be interested to hear if there downsides to this sort of non-skyteam connection (besides missing out of a few MQMs)