Target Hero:
1- Target Hero is the Hero with fewest Energy gems in the Reserve zone, that the Overlord's dude can reach with Melee/Ranged attack.
2- If several Heroes are tied for Energy gems in Reserve, Target Hero is the one with more gems in Wound zone.
3- If still tied, players choose.
Alternate Target Hero:
IF the Overlord's dude cannot reach the Hero with fewest Energy gems in the Reserve zone...
1- Alternate Target Hero is the Hero with second fewest Energy gems in the Reserve zone, that the Overlord's dude can reach with Melee/Ranged attack.
... etc, same as for regular Target Hero....