davtur19

armbian-firmware = minimal blobs that are needed that on-board wireless function + few popular ones = https://github.com/armbian/firmware 
- full = + everything else https://kernel.googlesource.com/pub/scm/linux/kernel/git/firmware/linux-firmware.git
 
You can install one of those, while source package, headers and armbian-config are optional. Also armbian-firmware if your will not be running any wireless.

Kernel = image + dtb package. Those are the core.

@Fred St-Pierre if you want to use roc-rk3399-pc you could try using this image: https://www.armbian.com/firefly-rk3399/
The versions with the 4.4 kernel works on mine roc-rk3399-pc, however the usb ports and some gpio don't work.
Versions with the 5.4 kernel do not boot.
Also I don't think nvme works, I have the extension but I don't have a nvme to try it.

Also, I leave here my "armbianmonitor -u" in case someone more experienced than me wants to make an armbian build for roc-rk3399-pc.

Edit: you can compile the image for roc-rk3399-pc by following this guide: https://docs.armbian.com/Developer-Guide_Build-Preparation/