Drivel is good. There's a lot of it on this forum !
Let me don my explicit hat.
Two. both rated on type go somewhere. It is agreed that Pilot A will, for the duration of the flight be the flight commander. He does the departure and ten minutes into the flight asks pilot B beside him to fly the rest of the way and ten minutes from destination he, P1, will do the arrival.
P1 logs 20 mins. handling time and his mate logs the balance as P2.