In afraid I don't have much to suggest with this content patch.
Soulforge Armor (D2) set is very good but not yet available.
Plate with spell dmg is ideal, but mail could prove useful with lack of gear present
Posting this from my iPhone or I would post links (which I will do later)
Edit: Items for Spell Dmg gear (shockadin)
Chest:
Plate of the Shaman KingNeck:
Beads of Ogre MojoTrinkets:
Darkmoon Card: MaelstromHeart of WyrmthalakRings:
Don Mauricio's Band of DominationRune Band of WizardryShield:
Force Reactive DiskGizlock's Hypertech BucklerMain Hand:
Mastersmith's HammerTwo Handed:
DemonshearCloaks are hard to come by imo, your best bet is to find a BOE green that increases spell damage, DM West has the Amplifying Cloak, but its only stats are +18 spell dmg.