It's not just filters that will be effected by putting a comp before them, it's overdrives too. I would go:
bass>tuner>dod>marshall>comp>exciter
comp before exciter as compression can take some of your highs away!
You'd have a nice little board there, but i'd need to add some more pedals, or a B2.1U for a phaser, different levels of overdrive, fuzz, pedal wah, digital delay etc.