Your effort with finding the minimalist visuals for maximum performance is mostly in vain, unfortunately. On a machine that is powerful enough to run OBS to decently capture and optionally stream, the impact of of Aero's desktop composition is so small, it is negligible. I bet, you have the same fps with or without. The settings were kind of relevant at a time when XP and Vista was the current Windows, but nowadays each machine is so powerful, it doesn't matter if you activate all of it or nothing. It's mostly running on the GPU with very efficient GPU commands, after all.
If you feel your desktop is faster with deactivating this stuff, it is because you deactivated the eye candy stuff such as animations, fading in/out, sliding instead of instantly move. This stuff make desktop interactions take longer, but not because it is so resource intensive, but rather because an animation takes its time to show.
Because of that non-impact, and because of other benefits of it, desktop composition is permanently active and cannot be deactivated starting with Windows 8. In some areas, it actually makes the system faster and needing less computing power, you know, because partly obscured applications are not requested to redraw their app window every time an app on top changes its position or size. That picture info is still in the private frame buffer and does not need to refresh.
