I remember reading that the extra dice from magic weapons was in part being split up with your proficiency to prevent the absolute need for magic items. I can't find anywhere that proficiency affects extra dice. Is the extra damage just the weapon specialization damage? So is the best you can get 4 weapon damage dice (+3 rune) and +8 from legendary specialization? I'm fine with that if that's true as that's functionally the average of 2d6 more but I'm unsure if in reading it right. Anyone know the answer?