Update: Added 92mm Hardware Labs Black Ice Nemesis Radiator.
Also in photos, the rear fan is backward. I didn't realize until later. It's flipped as exhaust now.
Testing was done by playing Destiny 2 for on a 2-hour stretch.

Ambient: 16.66°c

100% fans without side intake fans.

CPU
Idle: 35°c
Max: 85°c
Average: 60°c

GPU
Idle: 32°c
Max: 78°c
Average: 46°c

100% fans with side intake fans.

CPU
Idle: 33°c
Max: 84°c
Average: 52°c

GPU
Idle: 28°c
Max: 80°c
Average: 41°c

(Old Build)
Disclaimer: Temps would probably be lower if I utilized 2 more fans available to mount on the side panel.

Temperatures

Ambient: 21°c-25°c
CPU
Idle: 40°c-50°c
Max: 77°c-83°c
Average: 54°c-68°c

GPU
Idle: 35°c-40°c
Max: 54°c-70°c
Average: 46°c-51°c