I thought to allow Heroes to perform special actions while they lead their armies, something based to on their proficiencies. For example:

Mass Combat: a Hero leading a unit can make a proficiency check each round to perform a special action. All effects only apply once.

• Animal Handling: a mounted unit move increases by two.
• Healing: a unit in reserve removes one hit, and can re-enter battle after 1d5 rounds.
• Intrigue: chose one enemy unit in the same zone. You cannot attack each other.
• Leadership: change an R result to an H.
• Mountaineering: ignore the effects of mountain/cliff terrain.
• Siegecraft: +2 melee and ranged when attacking a Fortification.
• Spellcraft: cast a Battle Spell.
• Strategy: +1 to move, or +1 to melee, or +1 to charge, or +1 to missile, or +1 to defense.
• Survival: ignore the effect of a specific terrain.

Thoughts?