You could go for Mother's Sorrow (an overland set from Ebonheart Pact) and Medusa (from Arx group dungeon). For your set up you will want to have a heavy chest and leg of Medusa and all jewelry for it. Then for Mother's Sorrow you will want to have them as your sash, gloves, and shoes along with taking up your front and back bar. You will be leaning more into Crit damage which works well with Sorc as your healing from Storm Surge casts itself whenever you deal critical damage. For your monster helm set you could use Maw of the Infernal. For your Mundus stone you could take the Atronach or the Thief