Regarding remote mobbing, here’s the podcast I mentioned (unfortunately in German): https://www.innoq.com/de/podcast/061-remote-mob-programming/ The good news: they’ve just released an ebook about the topic - in English. 
I haven’t read it yet, but here it is: https://www.innoq.com/de/podcast/061-remote-mob-programming/
Also, I’ve done a Power Hour on the same topic earlier this year, check it out for more questions and answers: https://club.ministryoftesting.com/t/power-hour-pairing-mobbing