Number one thing i have learned is when doing front/side/rear lat raises for the shoulders is to use strict form and never use any flailing momentum to bring the weights up.
Go with lighter more controllable weight for 4 sets of 12 to 15 reps for each head.
Then you can finish up with barbell/dumbell presses.

you may want to try a pre-fatigue routine before your heavy shoulder press sets.

If your gym has a good cable rack, set the height by your ankles and knees. that will allow you to position your body at just the right angle to hit all the deltoid heads. you can turn yourself to the side, face front, whatever you want. do your reps slowly and with light weight to explore which angle and body position hits the deltoid best. Work with high rep ranges and get different angles, and make sure your elbow is straight the whole time.

once you get the hang of it and figure out which angles and positioning work best for you, you can start to load up the weight! but keep the motion slow (principle of time under tension) and dont go under 12 reps per set. as many sets as you like.

Now do your heavyweight shoulder presses!

Remember Arnold's advice for those whose shoulders are not growing? Switch for 1-2 months to high reps.

worked shoulders last night. 75 lb db. Did viking press's and straight DB press

Ive done this for the last month and putting some meat on.
Heavy push press-5 sets 5-8 reps(including warm-ups)
Dumbbell presses-3 sets 7-10 reps.
Side laterals-3-4 sets 8-10
Front raises-3 sets 8-10
rear laterals-3 sets 8-10
upright rows-3 sets 8-10

I think my traps are getting enough work on back days.

Shoulder presses, Deltoid raises, and front and side raises on the cables do it for me bro!!!

Shoulder press with bar and dumbbell, cleans and press give you a once size. Got to go as heavy as possible to squize 6-8 reps.

I only do one movement for the shoulders. press's and LOTS of them..
never done side raises. ( to awkward). just straight up dumbbell or military press's with a
straight bench ( straight up 90 degree's). the heaviest I have gone is 275 behind the neck.
stick to basics and LOTS of them. its works.. have patience..( takes years to get what your looking for at least for me.)

I do shrugs.. but thats probably the only other movement that I do for shoulder. and I really consider
that a compound movement anyway.. but heavy ( 400 lb plus )

my last shoulder routine

4 sets dumbel shoulder press
8-12 reps

3 sets smith machine military press
4-8 reps

4 sets dumbell laterial raises
12-15 reps

3 sets cable side laterials
8-12 reps

4 sets rear delt flys on pec deck
8-12 reps

3 sets upright rows barbell
8-12

3 sets cable uprightrows
8-12

3 sets shrugs behind the back smith machine
8-12

Its more of genetics.Try pyramids,drops sets tri set monster sets any thing different from the last workout to shock the body will give growth if you eat and sleep proper.

Starting out I found it difficult to build muscle in that area. In percentages and compared to other main lifts the Military press is obviously weaker. So I always got stuck on plateaus with not jsut military press but other shoulder lifts as well but it was because of the way I was trying to progress. A 5 pound addition to your Military is a higher percentage of weight being added as compared to say your bench that you most likely can do more. In order to build muscle and gauge that you are actually gaining muscle is if you are adding weight to your lifts or your ability to lift a certain gets easier (Ex: being able to press 115 for 7 and progressing to be able go for more reps). What I did was buy 1.25lbs. plates. So instead of progressing by 5 lbs. (A 2.5 on each side) I progressed by 2.5 lbs. instead slowly but surely. It was like saving change. You won't notice a difference but it will add up.

I've had good success putting size on this past year by increasing variety.. Usually 3 sets upright row,
than 3-4 sets pressing movement,
3 sets side lateral but sorta keeping my wrist limp and turning in a bit towards the top like i'm pouring a pitcher of water,
than 3 sets seated bent lateral, and
3 sets front dumbbell raises

followed by my shrugs on non deadlift weeks

In years past I think I focused too much on pressing movements and used laterals as an aux.. now It's the reverse which I think is the key.. I still do clean and press once a month for max but for my workouts I use relativity lower weights for my presses and focus on using the shoulder muscles.

Ten sets of ten on an arm day workout had me double my bodyweight in lifts in a few months. You'll be sore but it'll shock the system. I had 60in shoulder measurement and im 64in tall. And you gotta get those rest days in too if you're hitting hard n heavy.