I am getting a little uncertain that there are any presidented cases where weapon abilities have increasing efficiency according to the other abilities of that weapon.
I actually had another consideration. I was thinking that...
Might be better abilities for other items than weapons and armors. I am again, not sure, but I believe most weapon abilities have had a direct influence on the fighting aspects of the weapons. They could easily be made into abilities that could be placed on rings or amulets though. But, from what I can see from DMG, weapons have abilities that increase their combat-effectiveness and armors have abilities that increase protection...
I actually had another consideration. I was thinking that...
Maybe weapons that augment undead abilities, like the cold aura of a lich.
One that decelerates rot. Nice for ghouls, intelligent zombies, and any other ones that constantly rot.
Might be better abilities for other items than weapons and armors. I am again, not sure, but I believe most weapon abilities have had a direct influence on the fighting aspects of the weapons. They could easily be made into abilities that could be placed on rings or amulets though. But, from what I can see from DMG, weapons have abilities that increase their combat-effectiveness and armors have abilities that increase protection...