Top End Pulling Strength!
Incorporating paused reps has been one of the most useful things I've done for improving my overall pull up performance. The pause has made me MUCH stronger at the top of the pull up, and the added strength at that part of the ROM has been key for improving my technique. I don't do much in terms of weighted reps these days, but after setting a PR on paused rep bodyweight pull ups, I ended up setting a rep PR with unpaused reps with a 10kg. I noticed I was MUCH better at grinding out tough reps, specifically at the top where I would normally end up failure. For me, these have been the most useful thing for improving my overall pull up ability, even more so than weight reps.