from the wiki these are the damage caps by archetype. Are you sure that you can hit for higher than 20 weapon damage + str bonus?
caster
levels 1-9 - weapon damage cap is 6
levels 10-19 - weapon damage cap is 10
Levels 20-29 - weapon damage cap is 12
Levels 30-39 - weapon damage cap is 18
Level 40+ - weapon damage cap is 20
priest
levels 1-9 - weapon damage cap is 9
levels 10-19 - weapon damage cap is 12
Levels 20-29 - weapon damage cap is 20
Levels 30-39 - weapon damage cap is 26
Level 40+ - weapon damage cap is 40
melee & tank
levels 1-9 - weapon damage cap is 10
levels 10-19 - weapon damage cap is 14
Levels 20-29 - weapon damage cap is 30
Levels 30-39 - weapon damage cap is 60
Level 40+ - weapon damage cap is 100
http://wiki.project1999.com/Game_Mec...bat_and_Damage
This makes it seem like even a 40/40 weapon would act as a 20/40 weapon.