Are this thing gives you the same volume of damage right?
Multi Attack gives you an extra attack or extra damage (depending on the Skill) of 50% for each MA. so +4 Multi Attack is +200% damage. this will take up 2 spaces of two +2 MA. it doesn’t show up on your damage but will show on your DPS.
Skilled Mythic increases your Primary MH Skill by +50%. it only takes up one space. haven’t used it yet so don’t know it if shows up on DPS or not.
if you ever use Discordance Mythic, your Primary & Special Skill get switched, so the Special gets the benefit of Multi Attack. but Skilled Mythic stays with the Primary that becomes the Special.
using a Staff, Meteor would get +200% damage from +4 Multi Attack while doing 100% of Weapon Damage. Comet would get +50% damage from Skilled Mythic while doing 750% of Weapon Damage.
if you do 2 MA or 1 MA & Skilled, that is 3x damage. 2 MA & Skilled together is 4.5x damage.