i think you getting the two speeds mixed up.
because i can never get over 250mph IAS, so i thinking you must mean TAS...(i cruise at around 240-260TAS, 290TAS once bombs have gone). but if you mean TAS i dont know of any bomber that can fly at 150-160mph TAS at 20k
yes, drones should be made so we cant run max all the time.
but the real issue here is we never really get formations (u call 3 bombers a formation?)
my squad the 303rd bomber group run cruise (155-180IAS) settings all day to keep a tight 6-12bomber formation, but if we are on our own, we need our speed much like the lone bomber in WWII going max power to catch up with formation, or to get away from target once hes lost formation.