Pyros
<Silver Donator>
All increased damage is additive, all more damage is multiplicative. If you're using a lightning spell, and all these are Increased, then you have +40% damage. If it's a lightning attack, only 30% since spell damage doesn't work. This part's actually very simple to get(although it's not explained at all in the game I'm pretty sure).This.
I still don't know the difference between:
+10% Spell Damage
+10% Lightning Damage
+10% Elemental Damage
+10% Damage
When talking about say, lightning damage. I mean, I know what each one -does- I just don't know how they all interact. You're right, there's a lot of complexity for complexities sake.
I do dislike all the more damage supports though, as most of them are just more with a side effects, and often you just stack the ones with side effects that don't affect you or only affect you positively(like reduced duration on shit you don't care if it's shorter duration, or elemental focus when you build for no crits anyway and so on). And it basically boils down to checking pob and figuring out which supports add the more damage after you've selected the "good" supports like GMP or whatever.