Personally, I think there is going to be quite a large balance issue no matter what coalition rulings are in place. The top regiments (15th,92nd,45thn,71st,13e) obviously shouldn't be able to play with one another, however, the case can be made that 96y,55th,77y are all top regiments too. The problem I see going forward from this would be that the "best of the rest" (no disrespect) regiments (33rd, Nr13 and IVe) give a significant advantage to the top regiments that get to partner with one of those three, and would leave the other top regiments having to partner with far more casually oriented regiments. Also, despite my support for 45thn, 92nd etc being able to play with their grens and centre companies as one team, I also feel this would give a significant advantage, especially if other top teams are forced to play with more casual oriented regiments.
Long story short this is an extremely difficult tournament to balance correctly and I absolutely do not envy you Kincaid