If you have been working out for 5 years and are doing all these exercises 3 x weekly, ie.:
<div></div><div id="QUOTEHEAD">QUOTE</div><div id="QUOTE">Mon Wed Fri
Deadlifts
Squats
Inc bench
weighted pullups
bentover rows
standing mp
shrugs
weighted dips</div>
then I think you should try an abbreviated routine (ie. fewer exercises each session). Split your list up into A and B routines like this:
A
Deadlifts
Inc bench
weighted pullups
standing mp
B
Squats
weighted dips
bentover rows
shrugs
and then alternate between the two. ABA one week, BAB the next etc. (I have just used your list rather than suggest any alternative exercises).
As far as volume goes, with only four exercises you should aim for 2 x 15, 3 x 10 and 4 x 5. You could do something like this:
Week 1: 15,15 (at beginning of week 1)
Week 2: 15,10 (by end of week 2)
Week 3: 10,10,10 (beginning)
Week 4: 10,8,6 (end)
Week 5: 5,5,5,5 (beginning)
Week 6: 5,4,3,3,3 (end)
:
: Drop down to sets of 3 if you like and do 6 or 7 sets
:
Week ?: Perhaps try for some new RMs or PBs
SD
The reps will have to vary each mesocycle to keep you away from MM failure more often. At the least, try to get a good 15-20 reps in for each exercise per session. You don't have to drop down to 3s but it can help with fatigue management and allow you to work at your 5RM loads (or above) for longer.
After 5 years of training, I am actually a bit surprised you are still able to get through a heavy workout with all the exercises you listed. What kind of loads are you using now compared to your body weight? If your training has been fairly effective to date I would have thought that your max lifts would be at least 2 x bw for deads and around 1.5–2 x bw for squats (perhaps better than this).
Do have a read of the thread link in my footer. It might give you some more grist for the mill.
All the best.