How important is the 3rd soulstone?

    What's the point of the 3rd soulstone on the weapon? I've been using 2 lvl 8 solace soulstones and a lvl 5 hate soulstone. From the event, I've managed to finally get 2 slumbering solace soulstones, so I'm making the switch when I level them up. But what's the point on having and upgrading the 3rd soulstone? I also have a slumbering hate soulstone.

    I've read through the soularchive on soulstones, it also mentioned more elemental damage = more proccing? Is that why the 3rd one is good to have even though it's different element?

    That's a special case, the third soulstone's elem. damage don't stack with your main elem. stat. Since you have 2 solace, your main elem. stat is solace then, and can't be added to hate stat and whatsoever...

    The point about upgrading and using a third soulstone on this case is mainly to raise your global elem. proc chance (as you know, soulstones deal extra elemental damage when they do proc, with the nature of these damage depending on the elem. of the stones; you should also know that, no matter how high your elem. stat is, as long as an enemy has elemental resistance, you cannot reach 100% proc chance although you might end up very close of it. This is where the 3rd soulstone gather importance).


    From what I've read on another guide (a while ago before creating the soularchives), having a third stone increases your proc chance because, if your main stones fail to proc, the game still does the test for your 3rd stone separately, and adds extra elem damage to your root damage if this test was successful; it seems these extra damage keep the same efficience as if it was your main stones that did proc, so if your hate stone proc, you should get the same extra damage than if it was your solace stones that did proc. That is why using a third soulstone was useful before.

    But now, with the release of HH/LF legendary weapon drives (LF available for all other versions than EU/NA for the moment) and since bosses' elem resistance is higher, using a third stone loses interest in general and especially for the last endgame raids.



    About the relation "more elemental damage = more proccing", it should concern only your main elem. stat. That is the other reason why is it strongly not recommended to play with 2-3 different stones (the first one being because you'll obviously deal less damage), but with at least 2 having the same elem. and a potential 3rd one if you want to raise their proc chance.