Mac gamers: what optimizations have actually improved responsiveness for competitive games?

I've been experimenting with different ways to improve responsiveness and reduce stutters while gaming on macOS.

I've tested:
- Ethernet vs Wi-Fi
- Different mouse settings
- Background process cleanup
- Various network configurations

Some changes seem to help, but I'm curious what other Mac gamers are doing.

What tweaks, settings, or tools have made the biggest difference for you?

Especially interested in:
- Input latency
- Frame pacing
- Network stability
- Consistency during long gaming sessions