It's well explained, so I found it to be an interesting read.
I don't know about the proportions for afibbers, I guess it's, as often, highly individual.
Nevertheless, as discussed in another recent thread, it may be crucial to know. I'm working on this proportion. I know I've been an avid Ca consumer for years. Bread and cheese are among my favourite meals. I've also been used to eat many fresh fruits and vegetables, but I never had a clue about a possible Mg deficiency.
I've tried lots of things in 3 years (afibber since Nov 2015), including four ablations and several rhythm drugs.
I'm feeling better now, with only 2 afib episodes last month (3h + 30min).
My last touch up was 4 months ago, but I'm really feeling better since I'm taking D3 and K2 vitamins, above my Mg supplementation, and caring to reduce my Ca daily ration.
My better health state is likely the result of repeated ablations and careful supplementation. And I'm nearly sure I need at least 2 parts Mg for 1 part Ça.