Random visitor from the past strolling through:
Damage = Damage Bonus + Damage Interval multiplied by a random# between 1 and 20. Short hand is Damage = DB + (DI *(value 1-20)).
The Damage Bonus is a static value (until shielding comes in PoP) and is unaffected by defensive disciplines.
Defensive Disciplines act on the Damage Interval side of the equation. Player AC and NPC Attack also work via adjusting the distribution of the 1-20 number that is multiplied by the damage interval.
Avatar of War for example has a Damage Interval off 45 and a Damage Bonus of 254.
So, an example max hit without defensive would be
254 + (45 * 20) = 1154.
Defensive just impacts the distribution of that roll for the damage interval. Basically halves the DI value, so a 20 becomes a 10.
Example max hit with defensive:
254 + (45 * 20/2) = 704.
Thats the mechanics at least. The DB and DI values may differ here.
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