I saw a interessting Discussion about retuine Units on the Discord, so i thought of charing my ideas for them here.
I think firstly make them cost a new resorce "prestige". Prestige is scaled by Charisma, and my by further raised by an perk.
Preistige is not a resorce to pay to get your retuine Units to the fight, but insteat a cap of units, you can take as retuine Units.
Different units have different Retuine costs Example: basic infantery 3, Builder:3 range Fighter 5, cavalery/siege weapons 7
Generals 15; Dragons 30.
so if you have 30 Prestige you can either have 6 range fighters, 2 genrals or 1 Dragon as Retuine Unit.
Retuine Units have a levelcap of halve Hero level, wich can be increaced by another perk "Teacher"(either 0,5 or 1 per Level wich results in eihter Retuine level =herolevel or Retuine Level = 1,5x herolevel if maxed)