Conventional wisdom calls for setting all speakers to small. The crossover at the sub should be turned up to its maximum setting (effectively taking it out of the equation), and set the AVR crossover to 80Hz. You can adjust the AVR up or down a bit to suit your room and tastes.

I started out with nothing & I've still got most of it left
M60 VP160 QS8 EP350
M22 VP100
Algonquins