These are seem like random things you decided to put together moreso than actually efficient classes to rank up. These classes can help you get more kills assuming you're not terrible but they certainly won't rank someone up any faster as far as the combinations. Couple comments.
1.) Why would you put stalker on an SMG class? SMGs already have higher strafing ability as it is. I suppose maybe the pro version is nice but you could very well use Sitrep to help find claymores/bettys/IMS. Dead Silence or even Steady Aim Pro would be more beneficial.
2.) MK14 doesn't really need rapid fire honestly. If you're usually attachments you might as well slap on red dot or extended mags. if you want to use silencer.
3.)
Look, all guns that take little to no skill, except the MK14.
You put those guns in the hands of your average COD player or especially a splitscreen player and tell me how well they do...