Zager Krahl
Mongoose
The problem with keeping the EP increments fixed and playing with the damage per increment is that the weapon very quickly becomes overpowered - if you get +3 damage per increment, that puts you at +6 damage as long as you have more than 21 EP. It also makes the damage bonus jump more widely - going from 21 EP to 20 EP takes your damage bonus from +6 to +3...
My current system allows two axis of change - a CS bonus, and a damager-per-EP change. Some weapons could add very little CS, but lots of damage from EP increments (like an axe, which relies more on brute strength to wield than finesse); others could have a high CS bonus, but with low damage increments (like a sword, which would require more skill and less brute-force bashing). The damage bonuses could also be targeted to achieve certain effects or favour certain classes of wielders, like the Toran Hammer and the Blightstaff.
My current system allows two axis of change - a CS bonus, and a damager-per-EP change. Some weapons could add very little CS, but lots of damage from EP increments (like an axe, which relies more on brute strength to wield than finesse); others could have a high CS bonus, but with low damage increments (like a sword, which would require more skill and less brute-force bashing). The damage bonuses could also be targeted to achieve certain effects or favour certain classes of wielders, like the Toran Hammer and the Blightstaff.