Natural Order is, believe it or not, typically bad for Miko as it actually reduces his healing to other Eldrids. You’re fine if you don’t have Eldrids on your team, but if you do it’ll hurt your healing. Miko’s healing beam reaps the effects of attack damage, and since Natural Order decreases the damage against Eldrid, your healing beam is effctively nerfed.
At level 3, without any buffs/debuffs on either target, the healing per ping was 63.
At level 3, with Natural Order activated and no other buffs/debuffs on either target, the healing per ping was 48.
I have yet to tried this when the Eldrid who is being healed has Natural Order activated to see if the values differ as well. My suspicion is that the result would be the same as above, that the values will be reduced. Reason being that it effectively grants you a 25% damage resistance from other Eldrids and the game seemingly can’t (or doesn’t at least) distinguish between allies and enemies. Seems strange. But as said, I only think that and will have to testit out.