The advantage of starting 4 first is it gives you ships electrics with 4 in low.
The guys on the ground will appriciate it if you turn off the bleed air when thay disconect the huffer (it was not Zantop SOP) but I did it.
I think that the Capt/FO starts are due to some airlines changed things around in the cockpit to do away with the FE. I think that was just fine on a good day but when the L188 started to play up the workload went up by a factor of ten, it was about then that you found out why Lockheed built the aircraft for three crew.