Thanks so much for all of your help.
I do realize that I could use the Stomp XL (or maybe even my HX FX?) for all three instruments. However, the Grace Felix is the ultimate in an instrument preamps for me. So with the Dimarzio split signal from the piezo and magnetic and then separate channels of massive EQ on the Grace for each, I think I would rather use the Stomp more for FX. Besides, I have never liked the Line 6 EQs that much. Maybe operator error, but they seem a little too subtle for me. Maybe the Line 6 Stadium will someday be able to capture the Grace stuff?