The hard part is to actually get in a public game, so if you have a friend, better try a private match.
What you have to do is just arm every rope trap you find and lure your enemies so they get awfully trapped. It's fun seeing them hanging from the rope, so enjoy.
If you don't have any friends to try on private match, just pray to find some public game and run around the map arming every rope trap you cross your way, eventually someone will step on it and if you feel yourself confident enough you can run towar your traps and lure the eager hunters into their doom.