Fix/allow scaling of radiant aura

Radiant Aura says it's one point of damage per intelligence. HOWEVER
I have tested on multiple characters and the math just doesn't make sense. With 13 intelligence + the node for 2 damage per intelligence, that should be doing 26 damage per tick.
But the number that I get is 31. So then something is scaling it.
I tried with both gear/ buffs, and nothing, still 31
5% spell damage per int? that would be a 65% inc, = 42.9
So maybe it's the 2 fire damage nodes, 30% inc = 33.8
Again, foods buffs, both spell and fire rings, armor or fire damage scrolls have no effect on this number.
I don't mind this skill being fel only, but please allow us to scale it correctly, increases in fire damage should scale it, and I personally think spell/magic damage also should scale it.
Fighting an equal level mob of 21 it takes 22 ticks to kill (~682hp) If both spell and fire damage scaled giving 50.7 damage It would still take 14 ticks rounded up to kill. It's not even overpowered. (wand 2 shots)