New TVS-h464 and what to do with two 1TB Nvme M.2 SSDs

I’d like some guidance on what to do with the two Samsung 9100 PRO Nvme SSDs that I have and will install in this NAS. I use the NAS mainly for file storage and there will be only one user at a time:

Should I set them up as a RAID system disk, datavol1, and install the apps there or use them as an SSD cache for the main 66TB volume?

Please help me with your suggestions where the best bang for the buck lies!

Forget cache, if you want to use then, use the as a RAID1 system volume

So let it be written. So let it be done.

I’d also suggest using the two SSDs to store frequently used data or as a backup for important data.

That’s an option I hadn’t considered. Thank you.