Sounds like you’re getting to hung up on supplementation and diet. Supplementation is simply the icing on the cake, so go as far as you can manage by yourself and then worry about these type of things. Fair play to you for being so diligent about your training and diet though, not many can stick by it rigidly. Good Luck.
As mentioned in the Fat Fast articles, it’s a good idea to add an androgen to prevent losing muscle. I suggest MAG-10 or 4AD-EC for you, Methoxy-7 for your girl. I’d also sub Udo’s for the olive and flax oils. 4 weeks is a short time frame, see Don Alessi’s column a few weeks ago for his answer to the guy trying to do it in 8 weeks. You will have to go more than 500 below maintenance and give up the cheat meals to do it, although you didn’t state a specific goal. I used the info on T-mag, the McDonald keto diet book, and Bodyopus to bring my wife from 27% to 15% in 10 weeks for BFL (2 weeks left!), she is taking virtually every sup Biotest makes except the male only ones and original T2, which she couldn’t tolerate. Good luck!