Stage suggested: 1-1
The reason I suggest this stage is that it is the easiest to learn without being worried about the enemies. Make sure, before you start a level, that you choose the Options menu and turn Show Crosshair off. This will make sure that you don't have to worry too much about running it repeatedly to get this trophy, as all you have to do is finish "a" stage with it, rather than the entire game. Now that'd be nasty.
For those that prefer a visual aid: