This spell has so much potential but just flat-out sucks at the moment. The packets of damage are so small that even 20 resistance to one element on the target cripples the damage output.
Suggestion:
- Add an initial pulse of damage that is all fire. (Acid is appealing enough due to other spells while Fire is a weak spec for casters still even in the near-total absence of fire resist). Half the damage of Polar Ray is a balanced level to test IMO.
- Add a mass version (as a level 9 spell)
- Give this to more enemies and set the world on fire.
Fire needs a tool that reliably does damage to evasion mobs such as almost every Drow or Spider in epic elite content. This, IMO, would be it.