Those are fantastic, I have always loved your pack but sadly, have not got a behemoth capable of running it. My biggest piece of advice it to be wary of Z clipping on arms and legs, it can be a nightmare to fix. The worst part is that the top inside of the shoulder can be on the body and this can cause big trouble unless you leave the area fairly blank, you might need to experiment on where this boundary is.
Ah, good call! I hadn't even thought about the armors' z clipping.
I may have to give the shoulder pads a crescent shape on top to avoid it a bit there.
The legs and such, I don't think there's any real way of working around it; so I may just chock it up to "blame mojang for that one" lol.