@jabba1495 Just to get the volume calculations down on paper:
On day 1, you're doing a maximum 18 reps total
On day 2, you're doing a maximum of 30 reps total
On day 3, you're doing 5 sets of ladders going all the way up to 6?
So 6+5+4+3+2+1 = 21, multiplied by 5 sets, for a total of 105 reps on that day?
Here's some options you might wanna consider:
IF your joints are feeling achey, you're having issues recovering,
try decreasing weekly volume. Take a deload week where you do half or even less than half the total volume, see if your body improves in performance the week after.
IF you are feeling fine in terms of recovery, and I've miscalculated your weekly number of reps, try increasing training volume. Add in a few reps on an off day, add reps until you start adding sets, and then that just becomes a 4th training day. Then try that same approach for 5 days a week.
Eventually you'll need to scale it back and deload, but more volume at an appropriate intensity ( assuming you're properly recovering ) is surefire progress.
Related to the above more frequency/volume approach, trying throwing in more variations. Chin ups, towel pull ups, thumb over bar pull ups, commando pull ups. Give your joints and nervous system enough of a difference that overuse injuries don't start cropping up.