First you need to use the ACR 6.8 w/Silencer and Kick.
FMG9 akimbo as secondary.
Semtex, and concussion grenades
Scavenger, Assassin, and Marksman
Killstreak: Care Package, Pred Missle, and Reaper,
Death streak doesn't matter because you wont get one:)

This guide will tell you exactly how to win a Sabotage game the best way.
Step 1: DONT PLANT THE BOMB

Step 2: Get a 4 kill streak and throw down your care package outside. (watch for enemies trying to come for it, if they do kill them and earn you pred missle.)

Step 3: Achieve the predator missle and get the highest kills with it(preferrably a multikill)

Step 4: Use the Reaper and get as many kills as possible.

Step 5: Do this over and over again.

Step 6: Continue to own until you achieve a MOAB.

Step 7: Go into Overtime and call in the MOAB.

Step 8: INSTANT WIN:)

Hope this helps!