I want to make an Acid/good burst/+4 AC mineral 2 khopesh (or possibly holy/acidburst havnt decided yet...)...

My question is I've heard earth dominates positive

So if I go Earth/Opposition/Ethereal for +4 AC does my positive shard have to be Positive/Opposition/Ethereal

or can it be for instance Positive/domination/material (or whatever combination for the last 2 that fits what ingrediants I have lol)

And since the earth dominates positive I will get the AC boost no matter what my positive shard is?