Simple.
For pc, I use the Asus Xonar U3 to feed Dolby Headphone to my Modi 3 via optical. The microphone feed is done by the Schiit Hel, and my Amp is the Magni 3.
I use the Sennheiser 6XX with the cheap clip on mic I've had for an eternity.
For console, I don't ever use chat. I have a Mixamp 5.8 connected to my TV's optical out which can do Dolby Digital 5.1 which the Mixamp turns to Dolby Headphone. I'll then either use my KSC75X or 6XX directly to the Mixamp. Not ideal for the 6XX, but I'm lazy and it works all I need it to.
Contrary to the guide's philosophies, I'm not all that strict on audio and gear, and I tend to use the KSC75X for almost all my needs when I'm at home. The 6XX comes out for the epic games or when I'm playing Warzone with friends, of only because using the clip on mic with the KSC75X is annoying.