DBOR bar does take a high mount.
I know this for 2 reasons,
1. i currently have a DBOR bar with a high mount
2. I designed it that way
Regarding the indicators, I need to do a little bit more research, but I think possibly having the indicators on the flares plus the fact that the wings are not angled up as much as ARB (bar sits higher) the grill mounted ones are still visible from 45 degree might mean I'm ok
Nothing modular about this bar, if you want a modular bar buy DBOR's bar.