The way I'd think about this is (1) what do you want to do with your long pips (i) against topspin, (ii) against underspin, and (iii) against no-spin; and (2) what is your main offense going to be (long pips rolls or long pips aggressive pushes, forehand loops or flat kills, etc.)? Start with the shots among these that are going to be the bread-and-butter of your game. If, for example, you're a very defensive player who doesn't really attack and feeds off of opponents' errors, then offense is not going to be the main focus of your training at the outset.

The way I'd think about this is (1) what do you want to do with your long pips (i) against topspin, (ii) against underspin, and (iii) against no-spin; and (2) what is your main offense going to be (long pips rolls or long pips aggressive pushes, forehand loops or flat kills, etc.)? Start with the shots among these that are going to be the bread-and-butter of your game. If, for example, you're a very defensive player who doesn't really attack and feeds off of opponents' errors, then offense is not going to be the main focus of your training at the outset.

So at first, I'd just train the same shot over and over again. If your basic long pips block is shaky, there's no point adding in the footwork and body movement required to transition from that to a forehand loop off of your opponent's push in response to your block. Instead, I'd just take that basic shot (the block, for example) and drill it again and again until you feel good with it. First the ball (preferably through multiball) should be targeted to the same place on the table until you stop making mistakes there, then after you feel comfortable with that, you can transition to blocking all over the table (or all over the backhand side if that's your game). Entirely separately from that, drill, let's say, a long pips push (or whatever you're going to do with your pips against underspin). And go through the same process there. Only once you feel confident with both of these shots in isolation should you, in my view, move to putting them together into a block, push sequence (or a block-block-block-push sequence or whatever). (And then you can also try to incorporate whatever you're going to do with your pips against no-spin, such as a sideswipe or a light topspin roll.) The same is true of attacking. I'd train your pips attacks, forehand loop or forehand smash or whatever SEPARATELY, and only after you feel comfortable with those shots individually, then start putting them together into a plausible sequence for purposes of drilling. The sequence should be something that makes sense with your particular game and that you're likely to see in games. So, for instance, for me, such a sequence might be (1) block; (2) block; (3) attack loose push with my pips; and (4) finish off next high ball with forehand. For you, it's going to be something different, most likely. The sequence also should start simple and only build up as you start feeling more comfortable with each stage.

Maybe that's not the kind of response you were looking for (it's not "here's step 1, here's step 2 and here's step 3"), but unless a coach is working with a kid who's just starting out with a clean slate, he should be tailoring training to the player's abilities and tendencies, so drills need to be individualized for your own preferences, strengths and weaknesses.

As a modest suggestion - perhaps settle on one setup and play 95% of the time with it. There are enough small differences between 3 of them in your signature (double inverted does not count ) to lose the feel.

I humbly offer you these suggestions as an intermediate level guy.

Work on every LP shot in isolation doing multiball.
At the table:
vs. Topspin passive block
vs. Topspin Chop block
vs. underspin bump or hit
vs. underspin lifting underspin (opening)
vs. underspin Horizontal push (Inverted style push)

Then away from the table
vs. Topspin Chop off the table
vs. Underspin Horizontal push (inverted style push)

Drill 1-
Once you feel good about that, then move to LP/Inverted combinations.
He sends you top, you passive block or chop block
He pushes to your forehand, then you loop
He blocks the loop to your LPs, and you chop block starting the whole sequence over.