If you are good at it play Search and Destroy. If your lucky every kill is 5oopoints or more if a headshot or buzzkill and the match bonus isn't too bad. But if you want a hefty match bonus play Demolition the match  bonus is around 3,000points and it is like sabotage without the annoying KILL symbol over your head and you can get around 60 kills in the 2 or 3 rounds if your lucky. So level up and have fun.