Why use silencing shot for raid spec...how many times have you used it? Probably almost none, so its pretty much worthless in raids. So I typically spend the point in killer instinct.
My spec is pretty much pure raid spec, not pvp spec. And why not ce and ca, would you rather me grab cb. Also, have you ever heard of filler points? Entrapment and survivalist are there to get me to surefooted. Even that one point in in ca is filler to get into mm. You dont need silencing shot for raids, I generally put that one point in killer instinct.
I was previously in a guild that pretty much just ran kara, and I was the primary CC, so I put point into traps. I used to use trap mastery until we got to the point where I didnt need to double or chain trap nearly as much.
For a while I was respeccing 2-3 times per week when I was doing more arenas, so I play around a little bit with speccing to see how different things work. I have moved on from my old guild and will probably go back to BM spec, though it has been a while.
Want to bust my balls a little more? Go ahead and send me what you think is the "best" mm/sv build. I dont mind the criticism. I havent been asked to be the class leader of more than 1 ssc/tk+ guild because I know how to auto shot :P. I will say I dont know much of theory crafting or macro building. Learned everything by trial and error pretty much, which is why I come here for that.