Suppressors are awesome! I always use them. For me they are mandatory.
I would recommend using an assault rifle, two attachments, suppressor and ACOG or Thermal, have scavenger, hardline, and stalker, use a bouncing betty or claymore, then either smoke, concussion, or flash bang. For a secondary use the stingers.
For your killstreaks use helicopter, reaper, AC-130. Play domination, capture 2 points and then camp.
I always do this and get accused of cheating hahaha!
What really helps is posting in the correct console forums.
I use a supressor on all my guns, mostly cause i'm the front-man type of player. I'm always the one player on the team that sticks out to the enemy :p
You know how on wii there are only 2 rates of fire (600 and 900) and all the auto weapons fit into them (bar mp7, which is 700)? Because of that, any weapon that has 600 rpm with rapid fire gets a 1.5 icrease, 900 rpm weapons get 1.0 increase, and mp7 gets a ~1.28 increase. So it is viable to use rapid fire on mp7, so I do. I'm not sure if I like silencer or rapid fire better (I like focus and stability, kind of meh on attachments).
It depends on what gun.
MW3 Wii: 1274-1002-3360 Name: Dark_Striker
I personally feel that suppressors are most useful when...
A) you are using an assault or specialist streak package
B) You are playing a mode like TDM or maybe KC
C) If using assault, you are using high-end pointstreaks
I think that the fewer of that criteria met, the less usefulness a suppressor will give you
Number of Gamefaqs users who have openly admitted to having a dream about me (not even kidding)
1 ;) you know who you are!