I swear by my Resmed AutoSet S10. They have too many S10 models, so be sure to get the AutoSet (or higher), as it dials the pressure up and down. I'm kicking myself for sticking with an older S8 model for far too long, all the misery I endured was entirely unnecessary!

Proper pressure is the key to compliance. This machine has auto-set, so the minimal required pressure is used; it has better algorithms for it (compared to S8); and it has exhale relief (it drops the pressure when you start exhaling). It's easier to exhale, thus reducing the overall pressure.

An additional way to reduce the pressure is a neck pillow. I use one with a silly name of Dr Dakota. Aside from keeping your chin from falling down, it keeps your neck straight, and so it opens up the airways. It's a big deal if you have bad posture, like I do. This was a dramatic improvement for me.

Further, reducing the pressure will reduce leaks, and thus reduce pressure further, as the machine won't need to compensate as much. A virtuous cycle, if there ever was one.

And lastly, reducing the pressure allowed me to use a nasal pillow mask, which is very comfy, easy to maintain, and has the lowest leaks of all designs I have tried. I can't use it at high pressure due to mouth leaks, but I can handle it at the low pressure, and due to mostly zero leaks now ... the pressure goes down even more.

Combining all of these, I brought my leaks to zero (like, 90%th percentile), and AHI to less than one, like 0.6 is in there most of the time. That's only one event per the 90-minute sleep cycle.

Good luck!