When performing side laterals lately I have had my starting position at 15degrees from the side of my thighs to increase the activation of the deltoid muscle, this is because the supraspinatus is the prime mover during the first 15 degrees, since i’ve been doing this there has been a huge drop in pain around the bony point (Acromion Process).
When I switched to performing the exercise this way I literally went right back down to 5kg dumbbells until I could feel everything firing properly.
A nice extended set to this exercise would be to grab 2kg (I know very light but it burns!) and perform quarter reps of the lateral raise so that you will be finishing with your arms parallel to the floor.
Hope you all give it ago!