So I was wondering if anyone have found concrete evidence for how much weapon damage is worth main stat and how much main stat is worth secondary stat? I've heard 1 Weapons damage=8 main stat, 1 main stat =8 secondary stat.

Does anyone know if this is right or wrong and if so do you have a link where the math can be checked out? I'm trying to decide what myth pieces I need but I need to know how the values of various stats equal each other

Thanks in advance for any input!