Alright it's time for the final installment of this, 7 days and 168 Arbitrations have passed.   Note: I'm not sure if we've seen all eligible nodes now, here and there another one popped up, extending the list. But as I'm too lazy to check what is and isn't allowed, I'm going to assume that we now have the full picture with the 63 tiles (aka nodes) shown in one of the graphs. Prove me wrong. 😛   And not to spoil anything in advance, but looks like you were pretty spot-on @Int