We have shrooms in our tank with our triggers. I wouldn't put a shrimp in with any trigger though. They went through several (about 100) crabs that we got. They took out a crab that was a little larger than a golf ball.
The Pinktail picks up HUGE rocks and hurls them around the tank. Sometimes it is the rock with the shrooms on it.
We also have button polyps, some green tubular something, and a white something (corals of some form) they leave all of them alone.
No snails, no crabs, no shrimp with any trigger.
Just my 2 cents
Later.......C
Oh P.S. The Pinktail is great, except for funiture rearranging
the bluejaw is also fairly reef safe.(personal observation)