Dont know if it's been done before, didn't find anything in the search, so here it is, combine 2 techniques (bloodlines included of course) from any characters to make an uber powerful combo. Such as hiraishin + kagebunshin. Personally I'd combine Kabuto's cell regeneration with Gai's 8 gates. You could then use 8 gates more often, by constantly healing the muscles/organs as they're torn etc. Or at least 7 gates if 8 is pushing it. I'd like to read other people's ideas.