I've been stuck on the negative muscle up for MONTHS. I went back and did a mini cycle of rMU/PE6, which is the assisted negative, and I have also done a ton of mini cycles in PE7. But I can't seem to get any further than 5x3r. After the deload week when I try to move to 4x4r, I just can't do it, yet I'm to the point where 5x3r feels fine. So I'll do a mini cycle, but the same thing keeps happening.
Any tips?