M1 MacBook Pro - Moving from SLOBS to OBS


I'm running SLOBS - when I stream my CPU usage is around 45% - I have 4 scenes, with 8ish sources in the larger ones. I have had bad experiences with OBS on Mac before - freezing up mostly. I'm looking to take advantage of plug-ins though, so I'm back!

The question is this - what's the best way to keep cpu usage down low while streaming, less scenes or less sources or a more complex answer than that?