So, my latest playthrough has been a sort of sneaky mage with an interest in spears, really just because I thought a mage with a dwemer spear was a cool image. It wasn't meant to be any big thing for the class, but it slowly ended up becoming my main means of dealing damage, and rising to level 60. Bound Spear is still very much in use, but this character also has a deep interest in enchantment. So I'm wondering, what would be some good spear enchantments for a mage on the go?

I prefer cast on strike, as I feel that's a lot more efficient. If I want cast on use, I'll enchant an amulet or something. I also prefer something with no duration, as I've always felt that the vanilla game's habit of making a cast on strike effect last for ten seconds is rather a waste when I hit them again three seconds later. For effects like that, I figure daggers like a glass jinkblade or Mehrune's Razor are a better investment. That said, this being my first character with whom I've really explored the magic system, I also feel like I should do something a little more creative than just a damage boosting enchantment, like elemental damage. Absorb Health is always amazing, but I already enchanted a shortsword for that, and it does me quite well for regenerating lost health. The spear tends to be my opening weapon, the shortsword my closing weapon. So any thoughts on a fun, interesting early to mid-fight enchantment for a spear?

Also on sort of a side note, does anyone have any hard experience on ranges? I know that spears have slightly longer reach than most weapons, so would that be a problem for on touch enchantments?