Both proxies and RTMs are fun when using the "mines on other player's backs" technique. This is useful in team formats for getting multi-kills, and fun as heck in conflict. My personal fave is sneaking up behind an unwitting Pavlov-user who is focusing down their scope, and placing a mine on their back. Then I fire a single shot to get their attention. Then once they turn around, BOOM! LOL Nothing like looking your enemy square in the eye before detonating them.
...and don't make me re-post the "ILOVE NOOBS" GE video again...LOL too funny