I have been looking everywhere for her. I need to buy expert spells. Cannot find her at all. I looked in both halls. Waited til people were sleeping and checked every bed. Checked the balcony. Starting to think she died or something when a dragon landed there? Can she even die? Doesnt she start the master destruction spell quest?

she wanrders around the college

for me I've seen her in Arcaneum as well as in all of attainment

but yea with them moving around sometimes its hard to find them

She is in the "Hall of Countenance" most of the time.

Where do I find the spells for summoning Ice and Storm Atronarchs ?