My quick question? Have any of the members here found significant long term benefits from myofascial therapy?

Also is deep tissue work reccomended for TOS? Is it safe?

I think it really depends on what your version of TOS is caused by.

If soft tissue is a factor, involving poor posture, forward head/forward shoulders, or repetitive, then most likely some very good physio, chiro, bodywork and lots of self care focus would be beneficial. This route does take time could be many months even years, and limiting re injury activity or what ever set the TOS off.

For me it took about 2+ yrs to get back to 80% and not working..
My version was from repeated /chronic RSIs and coupled with forward head posture/strain due to work postures & uses.