The mk22s have become my favorite caps, and I've used 4s, 5s, 21s, and 41s. When deployed properly, their sound is everything I'm looking for: detailed yet expansive, warm but not dark, and capable of great imagining and a rock solid sound stage.
I use them 4' split in an OMT4 config, with 41s in the center, outdoors and in reasonable-sounding rooms. Also, had I Nick modify my actives to put a binder m & f inline on one cable, so I can use a binder extension cable to split them as much as 17'. Most commonly, I split them 6' to 14' onstage, about a foot up from the lip, at 8"-10" off the deck, and they are amazing in that setting, producing a wonderful, clearly separated image. Matrix with a pair of 41s ortf above the drums, and vocals off the monitor mixer. Getting my best recordings of Steely Dead this way, to my ears.
Here's an example, a bit of soundcheck from Kona:
https://archive.org/details/sd2024-02-24.matrixAbout 2 minutes in, during the keys solo, is a good example of the sound stage, w keys & guitar on L, drums C-R, and bass R.
After 40+ years of recording, learning so much these days. What a blast!