will you be able to make a custum unit? if you are these points should be considered.
1.being able to select how many in battlion
2.what weapons, armour and skills they have
3.what they look like and there name
4.there class e.g.warrior or mage(mages have less armour and weapon options but use powerful spells)
also points one and two should judge the cost e.g. 5 units with leather armour and rusty swords and no skills will be cheaper then 8 units with steel platemail, broadswords and skills.
if you have anything to add please do so