Mine's a 55 on Master difficulty and I still destroy. My base character is an pure mage Altmer with the Atronach sign, plus the ring of erudite, gives me over 700 magicka, which is more than enough to spam the drain life spell and raise dead, grip, summon, or whatever your choice. So my level ups went mostly into health and some stamina. If you get low, use bats to get away. Or mist form. There really is no reason to die as the VL as they designed it to be godly powerful...
...as long as you don't have Serana. Seriously, how did Beth miss this before releasing the dlc?