What are some creative ways to modify a front derailleur setup to optimize shifting performance in cyclocross racing, particularly when dealing with muddy and variable terrain conditions? Are there any specific derailleur designs, cable tension settings, or limit screw adjustments that can be employed to improve reliability and reduce the likelihood of dropped chains or mis-shifts during intense racing? Additionally, how do different types of chainrings and chain designs affect the overall performance of a customized front derailleur setup, and are there any specific combinations that are better suited for cyclocross racing?