We've tried TF x Insignia wargames in the past, got 5v5s at most, was fun but it wasn't 10v10s.
Not long ago there was weekly 10v10s but they're dead now, so hipster comps would be fun but if we can't even get regular fotm comps I'd say fat chance.
Not sure about Insignia, but firefighters are usually down for wargames, 2v2s/3v3s if anything.