I tried out a sword with Frost, but re-loaded since it made fights too easy. Health or Mana Drain are both good until the middle of the game (at which point you may have more restoration potions that you know what to do with). I bought a sword with Spiritual Damage from the traveling merchant by the cursed Abbey, which really helped clearing out the orcs around Aleroth, though stronger enemies tend to start having higher resistances as the game progresses. Stun is very good throughout the game, though having any two of Frost on a weapon, Stun on a weapon or the passive Stun skill can cause enemies to occasionally hang in mid death animation (sometime they will finish dying on their own, or it can be forced with an area effect spell which does not need a target).
