So one thing that wasn't really addressed in Arms of the Chosen was, how do you balance attunement costs for non-standard artifacts? It's something I've been thinking on recently, because a lot of the focus seems to be just on just how large the object in question is, but other times that logic does not bear out.

I would think the benefits of attunement would also affect the cost, but the sorcerous artifacts we've seen have no attunement cost at all. (Though those have a fairly steep buy-in cost to begin with.)

I ask mostly because I have an interest in the idea...