The key insight most people miss is that the Assistance Range setting matters more than just capping watts and torque. By default, the Avinox gives you near-full power at around 100W of rider input, which burns through battery fast. Pull that Assistance Range down and the motor demands more from your legs before it commits, which is far more efficient.
For Eco, a proven setup for long days is 400W / 60Nm / Assistance Range 3-7. One rider got 25 miles and 7,500ft of climbing from an 800Wh battery on those kind of settings. For Trail you can nudge power and torque up slightly but keep Assistance Range on the lower end so the motor isn't front-running your effort.
A couple of extra tweaks worth making: set Motor Overrun to shortest (stops the motor pushing past your pedal stroke) and if you're in Auto mode, the Auto Minus profile is reportedly more conservative. The good news is you can adjust all of this mid-ride from the touchscreen, so you don't need to commit before you set off.
One honest caveat: the M1 does consume more watt-hours than the Bosch CX at equivalent outputs. Tuning helps significantly, but if maximum range is the priority, manage your expectations accordingly versus the marketing claims.