Surrounds are to the sides (90-110 degrees), and Rears should be in-line with your mains pointing forward, no more than 1/2-way up the wall, assuming they are not blocked by furniture. Atmos speakers should be about 45 degrees forward and back of the MLP; again, assuming you have the room.
Those HTM-200SE speakers would be excellent Atmos Front/Rear Height speakers.
Basement 5.1.4: Anthem MRX 720, Monoprice 2-channel amp, Paradigm Prestige 85F/55C/15B. PSB Alpha A1/P3 for Atmos HSU STF-2, ATV4K, XBox OneS, Harmony Ultimate, Samsung 65" Q7D.
Living room: Yamaha YSP-6000 with 10" Yamaha sub, ATV3, Harmony Ultimate, 55" Insignia 1080P.