User blog comment:Plain'N'Simple/Letter Notation Up to Z: Outline and mnemonics/@comment-36984051-20191106024302/@comment-39541634-20191106102927

I'm not aware of any actual guesses for (0,0,0)(1,1,1)(2,2,2). It looks like even the speculation-loving BMS crowd don't dare to go so high. So X7 or X8 is really the minimum for how they might compare (0,0,0)(1,1,1)(2,2,2) to my proposed letter scale. It might even cross the letter boundary to Y.

But seriously, this is more of a question of human perception than it is a question of mathematics. Perhaps the best way to answer it, is to wait until the BMS folks integrate these scales into their sandbox model.

For (0,0,0)(1,1,1)(2,2,0) we can give a better answer. If I remember correctly, it is guessed to be as strong as the collapse Pi-n reflections for arbitrary n. More precisely: (0,0,0)(1,1,1)(2,1,1)...(n,1,1) is supposed to roughly correspond to Pi-(n-2) reflections.

(Nobody seems to be able to come forward and explain how this incredible feat is actually accomplished, of-course).

So looking at my table, the accepted guess for (0,0,0)(1,1,1)(2,2,0) would be around X5 or X6.