I am a small person, so I don’t have much surface area for my shot rotations. I have expanded on the areas shown in the diagram. For example, I do include my butt cheeks in my hip rotation (just don’t inject in the area where you sit, trust me..lol), and I have also added the outside of my thighs, and also a tad to the inside to my thigh rotation. One of the least painful and least likely areas to get lumpy on me is my upper outside arm, right below my armpit. I don’t know that any of these would work for you, but this is what I have tried so far.
I hope you are able to find something that works for you, and maybe these reactions will just ease in time as your body adjusts more fully to the med (this is what happened to me).