Just put your guns away to the nora at the entrance.
You can spec into Frostbite skill tree if you want control or you can just raw dog the fight by dodging and healing.
Zvedochka with double saw and flying saw ability is best melee for this you.
Snow Ball with battering ram (Spinning drill) ability is also fantastic if you can keep the boss still.
Other than that, nothing complicated. Goodluck