Insert Submachine Gun
Insert Handgun
Equipment: I prefer smoke grenades
Perk 1:Marathon
Perk 2: Lightweight
Perk 3: Commando
Deathstreak: Doesn't matter (Just don't pick last stand!)
I really don't think you should encourage knife running as it will only get the person a bad reputation and I see it as a confession to ones inexperience with aiming. But, since the class is here, I might as well make some suggestions:
The Submachine Gun should either be Vector or UMP. Vector offers a
lot of damage and very little recoil, and whilst UMP does jump around manically if you're spraying manually creating a 3 bullet burst (or something like that, just don't hold fire down) is amazing.
For your pistol, most knife runners use the Magnum. It is superior to the USP and M9 in its power, and since half the time you're going to be standing two feet away from your victim accuracy is not that big a problem. Some use Desert Eagle, but just look at the popularity of the Magnum.
For the deathstreak? I'd say Painkiller, just because you're going to be right next to the person half the time, and you're also going to be running into the battlefield a lot. Having 10 seconds of what is practically invisibility is amazing. Martyrdom could also be used, but it would work if you get killed from long range, which is bad!
Sniping:
Sniper (duh)
A Machine pistol or akimbo (holding two) shotguns
Equipment: Any
Perk 1: Sleight of Hand pro
Perk 2: Cold-Blooded Pro
Perk 3: Steady Aim Pro
Deathstreak: I prefer Martyrdom, since most kills will be close-range from behind.
This is also a pretty standard set-up for a sniper. The award for best sniper goes to Intervention because it does instakill on numerous occasions.
Now the secondary is a bit tougher on a sniper because there's more variation in what people use.
Since the nerf on the Akimbo Models, they've stopped being used. Most snipers will use G18 Akimbo just because when you're being shot from behind you need to spray bullets very quickly with ridiculous accuracy. You want something small because the bigger the weapon the longer the switch, and unless you're blind it's obvious that the sniper is a massive weapon, hence why a small secondary is necessary. If you'd rather not use the G18s a small shotgun is perfect. Akimbo Rangers are often used and do pack a punch, and lately I've seen the usage of a single Model, and whilst there is a problem with its fire rate (popping the bullet out of the barrel) it has some scary range individually.
Martyrdom is a must. Many sniper's positions are on slopes since slopes = high places, so a grenade rolling down a hill/staircase is great.
BOOSTIN'
Seriously, don't encourage boosting. That is
not good.