This is what I’ve started doing like a month ago and i’ve seen pretty damn good improvement (starting to get that 3d look)
DB seated shoulder press: 3 x 6-10 <-- for last set pick a weight you can do 6 times once you can get it 10 times use more weight next workout. (if im feeling good i’ll do two sets with the top weight)
1-arm DB lateral raises: 3 x 6-10 <-- like roguevampire said, pinky up and one arm at a time. Reason for reps being so low for these are cause I want to get stronger here, I think it would benefit growth.
1-arm Cable lateral raises: 3 x 10-15 <-- for these I would highly suggest doing them like so; have the cable behind you not in front of you. remember to keep pinky up, and be ready to feel an intense burn by now.
**Rear delts are important for that 3rd look so don’t neglect them. I’d do these like Meadows suggests. 2-3 sets for 20-30 reps using w/e exercise you can isolate them the most. (you can do rear delts on back day, depends on your programming.)
Shrugs: 3-4 x 8-15. I use HammerStrength for my shrugs. Every rep at the top squeeze for a second or two. Once you reached failure you can pump them out without squeezing at the top to extend the set (my traps can take a lot of abuse, and they seem to like it.)