L H wrote:Obviously you'll want high amounts of both, but I think (I could be wrong), but I think once you get -36% and -71% for Monster/boss hp to go into the negatives, pierce becomes more valuable. But again, highest of both is ideal
I think if you have none of one and much of the other it doesn't matter, while when you have both pierce gets more important.
Like there is no difference between -1 or -135 pierce and +1 or +135 spell damage but when you have 1% spell damage pierce is already better until it hits the cap. Assuming it's just as easy to get by, if you sacrifice 500% spell dmg for 20 pierce it looks different.
Spell that deals 100 dmg vs enemy with 0 res = 100 dmg. With 100 pierce = 200 dmg. With 100% spell dmg = 200 dmg. 50 pierce 50 spell dmg = 225 dmg.