Grimrock

Is there a way to change the minimum and maximum spreads for Attack Power?

For example, I want to make a spell that deals a reliable amount of damange, a fireball that does, say, 30 to 32 damage. It is consistent.

Right now, if I put in an attack power of 20, I will always get a damage spread of 10 to 30. Is there any way to adjust this from being simply 0.5*AttackPower to 1.5*AttackPower?

Like, is there a way to *add* a bonus to an attack power?

Let's say I wanted a damage spread for a spell, or a monster's attack, or a weapon, to be 30 to 36.

If I put in an attackpower of 6, I get a spread of damage from 3 to 9. If I add a bonus of 27, I can get that 30 to 36.

Is this something that is doabloe?