In my opinion the best item are:
Frostmind Raiment
Armor: 15 Protection: ice +8%, energy -8% Skill Boost: magic level +4
Glacier Amulet
Protection: ice +20%, energy -10%
Glacier shoes
Armor: 2 Protection: ice +5%, energy -5%
Icy Culottes
Armor: 8 Protection: ice +8% or Glacier Kilt
Armor: 8 Protection: ice +6%, energy -6%
Glacier Mask
Armor: 5 Protection: ice +4%, energy -5%
Umbral Master Spellbook
Defence: 20 Protection: fire +5%, earth +5%, energy +5%, ice +5% Skill Boost: magic level +4
Prismatic Ring
(protection physical +10%, energy +8%)
Falcon Wand
Protection: fire +8% Skill Boost: magic level +3 (Imbu: Powerful Void and Powerful Epiphany)
If u wanna make more damage:
Pair of Dreamwalkers
Armor: 2 Protection: earth +8% Skill Boost: magic level +1
Falcon Circlet
Armor: 8 Protection: fire +9% Skill Boost: magic level +2 (Imbu: Powerful Void and Powerful Epiphany)