I have previously posted what I done with her, read this thread

Sure the test post worked - Naga Potion?

I have just reached the auditorium where Elyssia stands. Any suggestions how to kill her?? When I try, my party gets wiped out fast, especially since she has the help of all the priests that surround you. Any special spells to use? Also, cannot find where Naga is. Thought I had been everywhere in temple, but haven't come across her. Understand there is a Tome of Fire somewhere that I haven't been able to locate either. Can someone help me? Thanks.

How did you mange to get to Elyssia if you haven't already killed the naga?? hmmm that's interesting!

Okay - Elyssia doesn't call for help until she finishes fuming at you - so get her started and attack immediately BEFORE she calls for help. Help will still come of course, but get her talking, run back up to the small halls through which you entered and start throwing distance spells at her. Move back into the hallway when you need to heal or when the hired hands start coming at you. You can limit how many of them can attack you at one time by staying in the tiny hallway!

Hope that will help you!

Wyv

Wyv, I bet Avalon took the shortcut with the crates in the elevator shaft. Seems like an awful lot of work by the way: it's way up.