This season MBI is marching 15 baritones (5 on each part) and 4 euphoniums. If I had my wish, I would have 4 people on each baritone part and then have a 3-4 euph split. The top euph part would match the lead or second baritones, depending on the music.
When I was with Regiment, we had 13 euphoniums and 7 baritones. Actually, that would be the ideal situation for Brass, but I've got to fight one battle at a time. :)
Michael Oldemeyer