Divinarius vs a Rare Dagger

Sup guys :) so i have question cause i got in an inner conflit. I Play a Crit Arc Shadow and have to Compare some Items with each other.

So i was thinking about to get myself the Divinarius dagger. This is my current weapon:



the Damage stats are pretty awesome, Divinarius will give me more crit chance with spells and a decent amount of more spell damage. Since there is lightning damage to spells on my dagger this will definitly impact my total damage output. i'm at like 25,5% crit chance, with curse on hit +9% crit.

So my Question is, will this like 10-15% more spell dmg through dinivarius will overhwelm my scaling flat lightning damage on my weapons? I will loose 30% crit multiplier too.

So what do you think?

thanks :)