I record a jazz orchestra with a stand right behind the conductor on a regular basis.
Tried a bunch of different heights (and mic configs) over the years, basically by eyeballing from the stage, then listening back..
Obviously conditions vary and its a game of finding a useful compromise.
I think the only reference that would be useful for you is that I try to get a balanced sound by thinking of placing the mics sort of equidistant from all rows of performers, front to back.
So adding height moves the mics away from the front row saxes (loud), and effectively sort of brings the mid-row trombone section (quiet) more into the mix. (Trumpets in the back have no problem projecting..)
The actual placement would be unique for the riser configuration they use on stage.
I additionally also run/split a couple spot mics for quiet instruments like percussion and vocals to get them to tape at decent levels for later blending.
-Cheers!