forgive me for saying but I hope it helps you, don't overthink it.

A very zen type person (jeez I wish i could remember) told me when I was doing the same thinking as you, "Let the poo be your guide"
I was also trying to determine how to make this "poo stew" in the most beneficial way. I have come to the conclusion that it is not a recipe that you are trying to "create" but a easy and manageable way to keep your chickens. You'll find what works for you along the way. Proper ventilation and keeping an eye (nose) on things will help you also. Granted there is gonna be some stinky poos, but you should not be always smelling a strong amonia smell. That means your litter is too wet.
I think it will be a good while before you get to the 8-10 inches of litter, I have yet to. I have used drop boards sometimes, sometimes not. I don't throw scratch in the litter anymore to encourage the chickens to stir it, as it was too dusty. I also used less additions of new litter, pine or straw mixed together in order to try to keep "some" moisture in the litter and the dust down.
My only issue with the litter has been if a waterer got spilled or there was too much moisture from a rainy window or brought in from wet boots, wet dogs or wet chickens. This litter will be very strong amonia smell as it releases gases when it gets wet. I added ventilation (i've even put a small fan in a window) and had to shovel out the drenched and worst of it one time. But it was still a manageable and temporary condition.
Dont worry about a ladder to get out of the litter just yet, I dont think you'll need one. Have fun with your chickens, take a breath and relax and enjoy them. It does get easier. And for all the ups and downs it is ALL worth it.
here is another thread that I found interesting and helpful. I like Pat's input as always.
https://www.backyardchickens.com/forum/viewtopic.php?id=59094