Avoid using [Corrosive Projection] if you swap aura's it'll make your 2 worthless if your squad also has it.

I've never had an issue with survivability here, 0 arcanes necessary, her powers keep you alive just fine.

• Balefire does great damage
• Pillage will keep you alive (remember to cast when you get affected by status effects)
• her 3 will keep your team alive and nuke low level trash.
• Use Aegis storm to trivialise mobile defense/excavation