You got that right except my Boost 'n Buff's after my Echo.
Tuner's last probably cos that's just where it is. My pedals are strategically placed, based on the chain on effects, length of cable I have and convenience Those stepped the most are on the front row. So my tuner just takes that last spot.
This wah's pissing me off cos its mounted on the board. EMF from my power supply is causing that thing to hum like mad. And I don't have a long enough power cable or cable to reach the wah if i put it off the board on the floor. Don't know if shielding the wah would help with that.