QuTS and TS-h973AX

[Enquiries]

Hi,
I want to by my first NAS and I decide me for the TS-h973AX with ZFS. ( after studying nascompares YouTube channel )

First step I will add:
- 2x Kingston Server Premier DIMM 32GB, DDR4-2666, CL19-19-19, ECC
- 2x OEM Datacenter SSD PM9A3 1.92TB, U.2
- 2x OEM Datacenter SSD PM893 3.84TB, SATA

Will this work fine?

How will I reach the best performance?
- one U.2 for the first system pool?
- other U.2 for the system cache?
- both SATA SSD´s for the user dataset in raid 0 for the best performance or better in raid 1 for security in mind?

In the secont step after awhile will I assembling the other 5 bay´s with Toshiba N300 for a big storage pool in raid 6, opr better in raid 10?

Thanks and regards,
Max.