It's weird . . . recently, I keep sucking at RE4's mercs. I use to get five stars every game. It's weird, it's like I've lost my touch within a day.
Yet RE5's doesn't give too much trouble. It's like the roles have been reversed. I think it's because I'm starting to play RE4's mercs a lot like I play RE5's mercs, which doesn't work very well. It's a lot harder to get high scores in RE5's, so different strategies are needed. These strategies aren't necessary to get a high score in RE4's mercs. RE4's mercs is much easier in terms of score.
Advice on Leon: For the Bella Sisters, get them on the ground with the shot gun, then whip out your handgun and shoot them in the head continuously. It's better to do this when you are high up in the shed.