No offense, but I'm pretty skeptical of your posts. I am also pretty skeptical about how healthy this method is.
IFing can be beneficial for many things. However, starving (in other words extreme caloric deficit) yourself is not beneficial for recovery. There is a difference between intermittent fasting, where you replenish your calories during your feeding window, and starving yourself to the 'skinniest you've ever been in your life.'
I know little to nothing about you, however from your posts and myopic way of thinking, it seems like you could have possible body dysmorphic disorder. I apologize if I am going too far out on a limb there. But rapid body fat loss from extreme caloric deprivation that makes you the skinniest you've ever been, with complete disregard for lean mass retention is a recipe for disaster and possible cardiac failure.
Healthy weight-loss is a steady process. It is a combination of a proper diet and exercise regimen, not an extreme calorie deficit.