The_Mark
I tried many different formations and it's certainly quite tricky. The problem I was having was trying to prevent the phalanx formations falling into a more depth orientated formation that I introduced to replace the single line with missiles behind. Having said that the way to control it is by working on the more critical formations first (i.e. for the larger armies) and then making them slightly more demanding. e.g.demand that one or two individual blocks of cavalry be filled or a single unit in a reserve line etc. Note - It doesn't seem to like it if you don't allow all units to be able to be selected (it didn't crash just gave an eerror message) - on the other had it doesn't object if you restrict below the maximum units. Basic objective seems to be to set the highest priority for the biggest and more complex formations first.