You really want monopole speakers for Atmos because they’re directional. Using quad pole speakers like the qs4 the mounting location is variable. You can certainly try them lower but I’d keep them above ear level.

LFR1100
VP180HP
EP600
M3 In Ceiling x 4
M5OW
M2 - Atmos rears
ADA1500.5
M3 Outdoor Speakers
ADA 1000.8