I think FPSs are a good proxy for mouse usage in general, because they require a balance of speed and accuracy. RTSs are more demanding of speed (higher actions

I think FPSs are a good proxy for mouse usage in general, because they require a balance of speed and accuracy. RTSs are more demanding of speed (higher actions per second), and drawing programs are more demanding of accuracy (which as you point out makes graphics tablets better here), but FPSs need a wide variety of mouse techniques. There is no "competitive office suite operation" so competitive FPS play is the most demanding test of this kind of pointer control.