-IceHeart Head and shoulder.
-Orgnum Scales Frost Staffs, Chest, Legs and neck.
-Frost staff: Absorb Magicka Enchantment
-Rattlecage on the rest.
Doing everything right will give around 30k HP, with a health food buff that can be bought in any chef you will have +38k + the maturation passive = 40k, if you think is to little you can swap Orgnum Scales for Plague Doctor, but notice that your health regen will sharply go down.
-Cast your defense buff and the lotus life steal
-Spam AoEs and DoT to trigger the IceHeart bubble, doing a good DPS and guarantying your survival
-Heavy Attacks taunt, give you a damage shild and restore health and magicka, so you will spend most of the time doing it
-Defending on the backup bar will also trigger the psjic bubble
-Don't die