I got lightweight pro and marathon pro by doing the elevator on Karachi in domination.
Got SitRep Pro in a cage match with a friend. I used tactical insertion and my friend had scavenger on.
He put a claymore down and i put tactical insertion down, i shot the claymore and he then shot me and picked up the scavenger pack.
He then had another claymore to put down and we repeated this process.
Your friend will be able to get headshots so it works out well for him aswell.