I just thought of a potential tactical trick for any of the three acting Generals.
- bringing some bludgers jinxed to target enemy Generals/Officers/fodder

Also, too bad neither of the Weasley twins could have been recruited. (I'm not sure if the existence of the map is known to anyone besides the twins) The Marauder's Map would have been an ideal tool for any Army to outflank, deny ambush, and execute precisely timed manuevers.