If you can easily cap elemental resistances, try getting chaos resistance or chance to supress spell damage on one of these items.
pob: https://pobb.in/ACWhvtQ-bpOJ
Life
3684
Mana
92
Energy Shield
2284
DPS
46M
Effective Hit Pool
214.45K
Chaos Res
57
Fire Res
75
Cold Res
75
Lightning Res
75
Armour
15K
Evasion
34K
Block
23 | 0
Crit Chance
100%
Crit Multi
556%
Rage
0
Strength
159
Intelligence
331
Dexterity
161
Ward
0
Item Quantity
0%
Item Rarity
0%
Movement Speed
38%