Bow Sorceress

[Brista]

One option you may wish to consider is to use a bow that gives Exploding Arrow. There are 3 unique bows that do this:
Ravenclaw
Kuko Shakuko
Demon Machine

The advantages are
- autohit, irrespective of Dex
- hits effect a small area, causing fire splash damage
- sources of fire damage such as enchant, charms, etc add to both the missile and the fire damage
- fire mastery boosts fire damage
- effects like fear and crushing blow are transmitted by the splashes

If you are playing on the realms then making a game Need Kuko 4 chips might get you a result