Pure damage:
2x Cyrodiil's Light (2 Rings), 2x Adroitness (Amulet + Belt), 4x Martial Knowledge (Armor only), 2x Wormcult (Armor only), 2x Torug (crafted, 2 Swords)
Thats the highest Spell Damage possible as far as I know. If you don't have Wormcult but much gold you could use Stygian pieces.
If you want less damage but more sustain I suggest 4x Healer (Amulet, 2 Rings, 1 Armor piece), 4x Magnus and 4x Mara (both crafted). Problem is Mara needs 8 traits researched, something not everybody has.
Pure damage:
2x Cyrodiil's Light (2 Rings), 2x Adroitness (Amulet + Belt), 4x Martial Knowledge (Armor only), 2x Wormcult (Armor only), 2x Torug (crafted, 2 Swords)
Thats the highest Spell Damage possible as far as I know. If you don't have Wormcult but much gold you could use Stygian pieces.
If you want less damage but more sustain I suggest 4x Healer (Amulet, 2 Rings, 1 Armor piece), 4x Magnus and 4x Mara (both crafted). Problem is Mara needs 8 traits researched, something not everybody has.