My suggestion is filler in low case (noisy, but barely flexible). The lamina do not crumble as you stem it. If it is unpressed, whole leaf, then stem it, and leave the strips wrinkled. If the filler leaf is pressed flat, then you will need to accordiopleat it, or bunch it by hand.
Binder needs to be at least in medium case (sounds like thick vinyl, but is fully flexible).
Wrapper should be in medium to high case (feels slightly damp), so that it is maximally stretchy. For pretty cigars, I trim the outer edge of the leaf strip. If it's heavy leaf, like CT Broadleaf, then I also trim the inner 1/2" of the strip, to eliminate the thickest part of the veins.
The Binder needs to contain most of the compressive force of rolling.
If the filler is just barely in case, then you can usually roll very tightly, and it will still draw. You can smoke such a cigar immediately, regardless of the case of the binder and wrapper. If the filler is in medium case, then it will compress into a solid dowel, if you're not careful, and will usually burn poorly until it dries (which may take up to 2 weeks).
I should add that there is a great deal of variation, depending on the nature of your leaf. If I'm using a non-wrapper variety as my wrapper, I will often roll it with the wrapper in only medium case, and accept a few wrinkles, since the leaf my not have good tensile strength when in high case.
Having good quality wrapper dramatically accelerates the learning curve when you are first starting out. Once your fingers know what to do, then you can handle less ideal leaf for use as a wrapper.
Bob