I'm playing Scion with my group and we are quite dissatisfied with the combat system (esp. melee vs. gunfighting and rolling damage) and its interaction with specific powers and mechanics (hardness, untouchable opponent and much more). We already have some house rules, but now they are up for tweaking and I would like to simulate some battles with specific parameters and opponents to gather some hard data (combat length, damage and death percentage) on the effects of rule changes. Is there software that would support me in this task or do I have to write it from scratch?