M1 is NOT better than a 3080 machine as the M1 has NO dedicated GPU and NO support for PCIe lanes. This conversation feels like beating a dead horse by now.....

Yes the Razers do (3) 4K outputs, I'll let you do a quick google to confirm that

I just picked up a new Razer Blade 15" with a 3080 and LOVE it! I've had the older 2080 and 1070 model blades as well, never have had any major issues with them in the 6-7 years I've owned them (I own about 15). So I can vouch for those laptops. VERY good performance for Resolume. Sager and asu...

Create a "Dummy" screen, add slices, then add that "Dummy" screen to your slice transform, but only output to your active screen

What's your AA set to?

Try using DXV3

If $$ is an issue than I would suggest Unreal (You will need to build it yourself). If you don't need video the MA3D is great. For everything else, Capture and WYSIWYG are great.

MA3D
WYSIWYG
Capture
Vision
Crescent Sun
Unreal

I'd just load it into a clip then.
TBH I've been asking for a test card keyboard shortcut for about 6 years without any luck on that, so I don't think a test card re-vamp would be happening anytime soon, but who knows? Anything can happen, all we can do is ask and hope for it, right?

Most people who use Resolume build their own, as some people want circles, some people want X's, some people want greyscales. I would just make your own. I built my own using Wire

Lots of great tutorial videos out there on this site. I'd start with this one:
https://resolume.com/training/2/8/45