[Synology NAS for parity drive in drivepool?]

My setup

Drivepool Windows 10

4 tb x 5

10 tb x 2

I used to setup snapraid for drivepool but now i'm too lazy to set it up.

Now i just worry about losing my data

So may friend want to sale his Synology NAS (ds413j) with 3tb x4 

I wonnder if i want to use that NAS to backup my drivepool data as a parity drive ? 

If it's possible i might buy his NAS

I'm a total noob

Thanks in advance

 

(Sorry for my poor English)