I was toying with the idea of creating a summon phantom warriors spell (from masters of magic). As far as I know there's no way to define a unit will be a stack of x size, that gets done only when creating units in cities. Anyone knows a workaround for this or if there's a hardly known tag to make this work?
Right now the only way I can think of is using several models joined as one and this might be very difficult to do.