I notice that the Orb of Chaos can drop single Growth/Wisdom/Acension/Clan with roughly the same rate. Orb of Clan could be useful in some condition, others using it for troops, so there won’t be much of a problem. But you want to craft Zuul’Goth, there is one issue.
To craft Orbs of power from all minor Orb, you need 4 of them to make major, except Orbs of Growth with require 20, which doesn’t seem fair, consider it’s as rare as other orbs.
My suggestion is to make single Orb of Growth give 5 levels instead of one. That would make it more useful for using on troops; only need 4 for max level for Mythic, and more on par with other when crafting Zuul’Goth.