Just want to jump in real quick and point out that sometimes when we ask questions, we don't want answers, we want reassurance.
OP, I'd say you fall into the reassurance category, and I'm not saying this as an attack, I'm saying it so you reconsider what you're really after, in this thread, and in exercises.
I say this because there was a great nugget of wisdom I found on here, and I wish I could credit the person who said it, but I don't remember, or know where it began but;
You don't get stronger from lifting weights, you get stronger from RECOVERING from lifting weights
If you're doing 5-6 days, you're not recovering properly, and the work may actually be hurting you, and some things to remember about Rich Froning are that 1) he's been doing this or a long time, 2) this is his job, and 3) he is a genetic freak that happened to stumble into the perfect field for his mutation, like Dean Karnazes, or Bruce Lee. He played baseball, and was a fireman, and if he'd stayed in either of those careers, he probably would have died unknown, but he happened into a competitive sport to which he was particularly well suited (not to downplay his hard work and dedication, just that sometimes it takes more than that).
Eric here is a good person to listen to, and yeah, it's important to do what works for you, but all of this goes so deep that it's good to have a solid foundation first, and somebody who's been there, done that, and is willing to take a good look at you without your biases. You're looking at year/decade long programs through a 4 month lens, and who knows what your diet, sleep and supplementation look like, where you started, or what your knowledge is.
Finally, if you're doing SS and you think 4 days is too long to rest, you're not doing SS, or at least, you're not doing it right.
We all have fundamental flaws that prevent us from being better -
Taking a look at "what works for me" we find choice supportive bias, and a failure to learn from our mistakes
(WFS), which, among other things, shows that if we do the same thing 10 times and it only works 3, we're still more likely to keep trying that same thing because it worked, and more than once, regardless of failure rate.
My personal favorite is the Dunning-Kruger effect
(WFS), which is basically, the less we know, the more we think we know.
My point is, don't let yourself get in your own way, and always take a moment to second guess yourself and the reasons behind your choices and conclusions. I've found the little workout notebook with all the weights and numbers is a huge help in getting out of my own way. It's hard to argue with numbers (but it can be done, so don't put too much stock in that either).
Figure out what you're looking for, from this thread and from your exercise. Do you want to feel tired and workout 5-6 days a week, or do you want to get stronger, faster, better? Because one is not necessarily the other, and in fact, probably won't be.