Hi.

How do you know that the supraspinatus (ssp) is popping out of its groove and that the subacromial buritisis is causing the clicking? i.e. what tests have been done to conclusively come to this statement?

If it is definitely that, then why is the ssp popping out of its groove? Is it too tight or is the gelnohumeral (GH) joint too loose and subluxing causing tension?

Your proposed treatment might treat the symptoms in the very short term for a very short relief period but i would think addressing the reason why it is causing the pain in the first place would be paramount.

And in agreement above, stabilising the shoulder would be a priority.