Speed freaks against skitarii and
AM have great possibilities to win
Very expensive army though, unless you scratch build a bunch of trukks.
You're looking at units among these ones: warboss on foot or bike, bikers, boyz, tankbustas, meganobz, trukks, buggies, deffkoptas.
You can add some ranged shooty units like lootas or lobbas that don't fit the theme of the army at all but they have great synergy with it.