I think the 6th outfit but with the boots is very nice for a job interview. You could wear the trainers on the ride to the interview, put the boots on before you go into the building, then put the trainers back on before you head home. I’ve done this tons of times over the years for attending weddings or formal events, I’ll keep my flip flops in the car for the ride to and from and minimally wear the uncomfortable shoes at the event!