I don't have a solution to this, mainly because this trophy is gained by coming in first in a Multiplayer Ranked Match. I can only give you helpful tips to help boost your overall final Score.
Recommended Match Type:
I would honestly recommend this to anyone who still hasn't gotten the trophy. If you decided to try and get this achievement within TDM, then be sure to select any class listed above.
I would highly recommend Recon - just because you get an outrageous number of point from assist using the T-UGS Motion Sensor.
First things first, either within the main menu or the ingame menu select a good close quarter combat shotgun. Using a shot gun will allow you to quickly take down enemies. Extended mags is highly recommended for Shotguns. Next depending on your class, you'll want to make sure you constantly drop your Med Kit (for Assault players), Ammo (for Support players), or T-UGS (for Recon players).
Using the T-UGS helps a lot since you can place it in a crowded area and run away. It'll give you some points each time a teammate of yours gets a kill within its range. For Ammo and Health Pack, players will need to stay over it for a time before you get any points. This is why I recommend using Recon since they just have to be in its range.
If you die, just run out and place it down in a somewhat hidden place and you should be good. Then just run around using your Shotgun to find and kill your targets.
But these are my only tips to helping you get this trophy, hopefully someone will find them useful.