Total Damage

I have the same question, which one is better: %matt or %total dmg?
If it based of some calculations, someone please post those equations for me.
Thank in advance.

Their equations are right but to make it simpler to understand think of the following

Say you have 0% matk and 100% total damage. Now you have a choice between 100% matk or 100% damage

Matk: You'll go from (100 + 0)% matk --> (100 + 100)% matk or 100%-->200% which doubles your dps

Dmg: You'll go from (100+100)%dmg --> (100 + 200)%dmg or 200% --> 300% which is only a 50% increase in your dps

So the way it works is you want to usually get the stat you have less of if it's X%matk vs X%dmg. Generally this is always matk when you start looking at this types of equations as %dmg is much easier to obtain

Note: When calculating %dmg, do not forget for bosses that it's treated as the same, so the value is really %dmg + %boss. Also don't forget %dmg from skills/link skills, etc