Oh man, uh.
Well, Kiaz is skilled in magic, but she was taught by Zala, who is even more skilled and could probably keep me safe. So I recon I would choose her to protect me.
Andreas is a soft marshmallow. While he can hold himself well in a fight, he is no match for Zala's magic.
Zanu is a skilled warrior. He is resilient and as difficult to kill as a cockroach, he would put up the most relentless fight. But overall I think that Zala could atleast keep him at bay with her skill in magic.
Zala's only opponent in the magical area would be Kiaz, but Kiaz isn't as skilled with magic, and hasn't used it for as long as Zala has. Plus Zala would know all of her tricks, seeing as she taught her. I feel I would be safe.
My only problem would be if the battle took place at night, as Zala's other half is not as trustworthy. She would only help me if she was going to get something out of it afterwards. She would easily have no qualms in stabbing me in the back, or just leaving out of boredom. If the battle was during the day time then I think I would have a decent chance at surviving.