What is this, and how do I get one?

That's debatable.

I couldn't argue a 3rd tier but 2 second tier vs. the 2 ring + set effect is something hard to compare to. Provided you can scroll the 9th anniversary ring for attack like you can with the Arkarium rings.. it'll make things much closer.

its more or less a scaler by level. of course, the higher base level you are, the more % stat will affect your range(due to a higher base point) and how well it is potentialed. I would imagine you would need at least like 10% to be somewhat competitive with +15 stat +10 atk, which if you can magically have 2 tier 2 rings, 2 6% rings(1 line unique, or 4% 2% epic on both) should cover the difference. Of course on max potential, the potential rings have a better advantage, as potential is nearly exponential. To a person who rarely cubes, the akarium rings will be more than enough.



I should have been slightly more clear, assuming the AK rings have like 2-4%, the rings above should have X% more to pseudo compensate for the difference.