How much damage does the sword do? The bonus skills are about as good as you are going to get. Actually, they may be too good; I briefly used a weapon with Frost on it, but found it made the game too easy, so reverted to my previous sword.
There is one potential problem. Mixing any two of Frost on a weapon, Stun on a weapon and the passive Stun skill can sometimes result in creatures hanging in mid death animation, and not dropping items or giving experience. An area effect spell that doesn't need a target, such as Hell Spikes, can force the animation to end. Some people also reported that waiting a bit or sleeping would also work.
Below are a couple of the best one handed swords I used, to give you an idea of what is possible. I was primarily looking for high damage.
Nobleman's Sword
Durability 12
Charm Quality 3
Damage 71-100
2 Strength
4 Agility
6 Constitution
60 Magic
Life Drain(4)
Stun(5)
lightning Damage(5)
Spiritual Damage(4)
Sword Of The Gods - found in wastelands (the final area of the game). DeathBlow shakes the screen; had this happened more frequently, I would have had to re-load a previous save.
Durability 24
Charm Quality 1
Damage 71-100
4 Strength
6 Agility
6 Intelligence
4 Constitution
4 Offense
100 Vitality
60 Magic
DeathBlow(3)
LifeDrain(5)
