Thrust or trust?
I fly the 737-500, in my company were asked to ecomical as possible without breeching safety, so in my opinion it's up to the ''Flight Commander'' he has not earned those four gold bars on his shoulder for nothing. Usuall we use between 85% and 96% of N1 for take off, but depends on the lenght of the runway, we can use 100% of N1 somtimes....