Surely for a bleeds off take-off it would be eng bleed 1 & eng bleed 2 as with the packs off you would be unpressuised so there would be no point in having the APU bleed on in the first place
Any reason in particular, why you would not use APU for pressurisation on a non-bleed takeoff?
With regards to the order of config, I personally don't trust the isolation valve to do its job properly, hence my actions are(after non-bleed t/o):
Isolation valve closed
#2 engine bleed on
APU bleed off
#1 engine bleed on
Isolation valve auto
I cases where isolation valve was left in auto, I have experienced dual-bleed light coming on briefly during re-config. No damage done however.