What are all question answer pairs where I would consider any set of those question answer pairs a net gain in utility, answered in order from highest net gain of utility to smallest net gain of utility?"

Having the answers to some questions can change the utility of the answers to the other ones, so "in order from highest gain of utility" may not make sense. You'd have tio ask something like "in an order which maximizes front-load utility compared to other orders", comparing the orders by the utility of the Nth place question rather than comparing the utility resulting from the questions.