What kills Willow Wisps

[Chicken Slayer]

I'm playing a conjurer on max difficulty and ran into my first Will-o-the-Wisp. Flame Atros, Headless Zombies, and Frost Atros had trouble with it. A lot of trouble. Is there some conjer creature that works better?

[AKB]

Will-o-the-wisps are hard for most NPCs to handle. They are very good conjuration pets, for whatever your need might be.

[Snake]

You can conjure Will-o-the-wisp's?

I did not know that.

[Chicken Slayer]

I think I just got into a bad fight with the first one. It's odd how sometimes conjured creatures will have a lot of problems in a fight, especially with multiple opponents, but then when you play it again or come into a similar situation, they may win easily. In any case, I picked up a faded wraith spell, which did the job, as did a clannfear, iirc.

[PrinceJonathan]

There is no Summon Will-o'-the-Wisp spell. Not without mods anyway.

I think Supreme Magicka has one, but all it does is provide a light source. Midas Magic has a few elemental wisps.

Wisps are bloody annoying to fight. They have 220 HP, are immune to Normal Weapons (so you'll need silver, daedric, or enchanted stuff), and have two abilities that heal them.

Wrack: {immune to silence}
Absorb Health 30 pts on Touch
Absorb Magicka 30 pts on Touch

Mind Numb: {immune to silence}
Absorb Health 8 pts for 5 secs on Touch
Absorb Magicka 8 pts for 5 secs on Touch
Damage Intelligence 2 pts on Touch
Damage Willpower 2 pts on Touch

Mind Numb is especially irritating as it means you'll have to hit up a chapel altar to cure the attribute damage.

Since they have no weakness to exploit you'll have to rely on something that hits hard enough and fast enough to inflict more damage than they can heal, or just run away.