tbh if your gona add loads of other "super units" or "elite units" and not put a cap on there usage wont they slowly replace the actual army's ?
i sorta like my simple swordsman / archers / knights and i rather see them grow more
maybe allow for your villagers to mine iron and then add "gear" to the game so you can equip your armys with armors / weapons you made in ur castle
it makes your simple units stronger, but if they die you loose more resources on them
+ it would make you able to customize your army's its looks a lil as well trough gear which would be fun
i wanna see huge battles of many troops bashing each others head in
not 3 giants and 4 giant snakes fighting 5 dragons and 2 ogre kings