Polymetric staves with irrational time signatures

Hello. I know how to handle different time signatures with concurrent barlines (2/4 vs 6/8), different independent time signatures, use irrational time signatures (2/6 etc. -I know the name irrational makes no sense here but it’s what they are most commonly called) but I’m struggling to figure out how to use irrational time sigs simultaneously with different time signatures, like in the attached example by Adès. I can tell Dorico to use a 2/6 time sig but it is treated as a 2/4 and so becomes misaligned with the rest of the music.

Any ideas?