Oh no you don't. I'll repeat Tancreds weaknesses. RANGED COMBAT. Aradeth is a ranged specialist. In short, if you fight her and she gets ANY amount of distance for her to draw the bow and fire at you you are screwed. Why you ask? because Tancred has no ranged weaponry. SO, if Fredrick fights her he has magic, Tancred has the ability to run in gigantic heavy armor, on foot, against an archer.