Orb of Storms Levelling Setup

----Level 4 Setup----
3L Frost Bomb + Onslaught + Arcane Surge (Dont level this)
Frost Blink
Explosive Trap (important)
Socket Orb of Storms (OOS) into gear somewhere (unlinked)

----Level 10 Setup----
3L Frost Bomb + Onslaught + Added Lightning
Flame Dash + Arcane Surge
Explosive Trap
Still levelling OOS

----Level 12 Setup----
3L Orb of Storms + Onslaught + Added Lightning
Flame Dash + Arcane Surge + Arc (Buy Arc)
Explosive Trap

----Level 16 Setup----
3L Orb of Storms + Onslaught + Added Lightning
Flame Dash + Arcane Surge + Wave of Conviction (replace arc)
Add Herald of Ice
Add Herald of Thunder

----Level 18----
3L Orb of Storms + Onslaught + Added Lightning
Wave of Conviction + Phys to Light + Faster Casting
Flame Dash + Arcane Surge

----Level 24----
Add Conductivity

----Level 28----
Library/Gravicius for Lightning Spire

Lightning Spire + Elemental Focus + Controlled Destruction
Final link (depending on colors) =  Advanced Traps / Trap and Mine Damage / Added Lightning

OOS + Onslaught + Added Lightning (swap to Elemental Prolif if 4L spire)

----Level 38*----
OOS + Chain + Prolif + Ice Bite* After A6 Twilight Strand Quest or Library

Swap Herald of Thunder for Flesh and Stone

Wave of Conviction + Phys to Light + Unleash

OPTIONAL SURVIVABILITY

Add Stone Golem
Add Cast when Damage Taken + Steelskin

IF ASSASSIN

Switch Elemental Prolif for Crit Strikes after Cruel Labyrinth