You talk of being "capped" on base damage and then switching to the "drape of the void touched", isn't the base dmg cap 100%? and if it is I would assume this is only achievable with Avatar loot, until then I take it that the base dmg proc is better as it, in essence, will raise all damage by 5% so even if it is only up 50% of the time thats a net increase of 2.5% DPS (250-500 dps on palace trash)
Thats assuming 100% of your outgoing damage comes from your spells cast.
Forgive me if I'm wrong but it isn't far off is it?
On palace trash ZW I do around 400-500 dps from melee which is 2.5-5% so lets say 97% is from spell dmg... so it could make a difference of like 15-30 dps, but thanks for pointing that out I will make sure that I factor that into my calculations in the future.