[Jafin]

If you don't want to reload, try to take out the priests before attacking Ellysia. Just run up and hide in the hallways after casting a powerful spell at her. When her priests come after you, hit the lead one with a Burning Haze, or even Flamedrop works well. That way the front guy can't do anything. Then start launching Flamestrikes and Elemental Blasts at them. And during the time you're launching spells, shoot arrows, throw knives, shurikens, darts, whatever at them. When you've weakened them sufficiently, head over into melee, and chop them up. Often I kill Elyssia before all of her priests are done with this method! Give it a shot and then go back and train your skills in the guilds. Guild training is a big must in this game, you won't get buy without it and with it, you'll destroy your enemies. If you still can't beat her, then go back to a previous save and train. Good luck!

-Jafin