With my compendium hood there's no need for masking as they are very deep. I'd forgotten I have one with my 10x8 Agfa Ansco Commercial View as well that came with the camera, although my Dagor is 1939/40 in fact it's coated and doesn't flare.

I have use masks to help prevent flare with some 35mm wide angle lenses but most of my main LF lenses are rather resistant to flare although I'll shade a lens from the sun when I can.

Ian