Question About Volume Controls

How should I set Volume Controls between Roon, Computer, Hardware.

Where should I control my volume.

Current Set Up:

Roon 100% Volume
MAC volume bypassed be exclusive mode to:
Schitt Wyrd (no volume control)
Dragon Fly Red DAC(no volume control)
Schitt Vali2 preamp where I currently control Volume
Audioengine 5+ has volume control but hard to identify level so I leave this alone.

Should I continue to use the Vali2 or set it at a level and use the Audioengine 5+?

Thanks for any assistance

David W