What about an ability for ammo units to regain shots if they get a kill? Like the UD blood hunter whatever she is called, instead of fearsome hunter it would be cool to try to manage ammo. Especially with UD having so few good ranged options, the hunter is a good unit at range and kills for ammo seems like a good trade off.
They have plenty of ranged options. Ammo would just weaken her. It is better to be able to deal ranged damage, then go into melee damage and use her HP
Each unit with Ammunition now comes with a new ability. Buy more ammunition. Pay 5 Nora per Bullet/Arrow/Head/cannonball