Which allies are better for Dark Eldar besides Eldar, Imperial Guard (Manticores) or Daemons(Great Unclean One)

Im thinking wheter Superhuman Toughness or Super human Blast damage is better for a moblie army like ourselves because im tired of cover huggers ( well im a hugger) but its too annoying with bullcrap like 2+ cover ( i know people would say bring venom spam but i never do because theres always that chance it wont work). Either send a T10 MC and force the opponent out of cover or blast them apart with barrage str 10 ordnance artillery