from what we've seen, i feel like a decent group strategy (which dbz character never ever use) would have been Tenshinhan and Piccolo getting up in Nappa's face taking him on at once with Yamcha and Kuririn popping in periodically to provide flashy distractions and keep him off balance and maybe even Gohan on the sidelines, tossing in a powerful attack whenever he sees on opening of when everyone else looks like they're in trouble.
but we'll never know