Gaurdians only die when thier light is destroyed, oryx can probably take control of any race that isn't blessed by the light, cabal, fallen, etc. So oryx would probably take control of them. Goku and Vegeta can block punches and dodge lasers, but never have I seen a blade or knife in DBZ, if a bladedancer went invisible and stabbed them in the back, game over. If that doesn't work one titan's suppresor gernade plus a nightstalker arrow has him not being able to use any abilities plus he can't move, then just nova bomb the crap out of him. Edit: -blam!- I forgot trunks had a sword