That's my girl for Ironman mage lvl 28
She helped me to kill the unweakened undermother and survived over 30 runs in SoH
Duell and Heavyhand are very useful, also don't give her too much endurance, otherwise she will use healing not so often. And intervention is very useful if you have enough mana pots, that way she won't die too often.
Ps: she can't be used for ark, you have to do that alone