The Iowa Hawkeyes figure to play their most difficult non-conference schedule under Fran McCaffery. As it stands, KenPom has four of Iowa’s 11 opponents as Tier A teams and it could get to a fifth depending on whether Iowa faces Creighton or San Diego State in the second game of the Continental Tire Las Vegas Invitational (or CTLVI for short).
The other best schedules I can find are in the 2016-17 range when Iowa played three A teams and that may be the case when the dust has settled on the 2019-20 season. But as it stands now, it’s tricky!