If you want the ULTIMATE multi-boost, forget this two effect thing and go for the Soulsonic Fourbanger!
Soulsonic Fourbanger"This could well be the ultimate tweakers boost pedal, with a switchable Rangemaster (PNP transistors but negative ground), Super Hard On, Opamp and JFET booster. The one change from his original is that I have included the original SHO circuit instead of his Crackle Not OK version of it. Each booster has its own gain or volume control, and are turned on with a toggle, and then the stomp switch takes the whole lot in and out of circuit."
This one is definitely on my to-do list...