i still think if gaara fought them he could defeat them. it would be an obvious win if he fights them one at a time likie in the movie "golden pagoda" (bruce lee, not rock lee :lol ) but if haara would fight two at a time i still think he could win.

he is smart (as seen while fighting rock lee and cushoioning his fall with the sand) also it does say the sand works without his will but that doesnt mean he cant control it as well and so he could proabbly find some way to trap his enemy in the sand and use desert graveyard.