I will use Ramaladni's on it for a socket. I'm not sure if rerolling the base damage on the weapon or rerolling resource cost for +% dmg would be a bigger dps increase. Reduce resource cost is also a decent stat for multishot build. Thanks!
If You already have %dmg rolled (let's say 6%, and wanna know how It would be if you roll 10%):
big dps * 1.10/1.06 (multiplying by 1.WISHED%, dividing by 1.ACTUAL%)
now that i have you here, i know tools like rerollcalculator exist for this purpose alone, but i've been curious on how to calculate the min/max damage rerolls
edit: staying on topic, rerolling base damage will you give better results, but my dead honest opinion is that a weapon wtihout both damage% AND good base damage isn't worth using on the mainhand;\, this would be good for an N6 offhand
Reroll the average damage. Max dps you can get is 3124 (not that you will reroll it to max but should be able to get close). Rerolling RCR to 10% damage will only get you 3074dps and you lose out on the RCR.
Plus, in the end you want a better main hand weapon. This way, when you find a better main hand weapon you can reroll away the average damage to CDR. Doing this and you will have both RCR and CDR which is really nice for off-hand.