I vote "no!" for artillery. Why?
a) With the "tech level" the game portrais, arty will not be able to fire from neighbouring hexes, err, provinces.
b) With the "tech level" the game portrais, arty is only usable to fire at fixed installations. (Non-existant) accuracy, slow reload time and abysmal setup and "aim" time made is useless against troops 99,5% of the time.
c) It's already in there. It's called magic. Cures all problems with accuracy (except for Abysians
), reload and setup time.