One of my faves was reflect 100% on self for 1-2 seconds. It acted as a low cost, timed parry and was mega fun to fight mages with.

You can do the same with sanctuary, but any % of sanctuary is useful, and people really sleep on it imo.

ETA: Just remembered another old fave, very low damage fire on target, enchanted on something. Because there’s no cooldown for the animation of casting from an enchanted item, it was basically a little flamethrower. I liked to put it on my gauntlet and feel like Boba Fett.