My son plays speed freeks and wins alot. Here are some of his dirty ork trikks. First give all vehicles red paint job, it adds 1 inch to your movement for free. Second give every vehicle stikk bomb chuckkas, this allows your trukk and trakk and buggy to tank shock. Next give every vehicle boostas, this gives you a D6 extra move. One buggy should be designated the kamikazee; give this one no weapons but spiky bits instead and this buggy keeps tank shocking, and since it moved more than 6 inches can only be hit on a 6, all models that attack it and miss take a auto hit. I have seen the kamikazee decimate whole squads of marines. The tactic??? full speed charge, tank shock with all vehicles, They can all move 25 plus D6 inches, next turn dismount assault, shoot what your not assaulting. Have two extra trukks because trukk boys fall back to trukks, not board edges, and if there are no trukks to fall back to, they are "crossfired" I saw him totally decimate a nid army by turn two. The only thing left of the nids was two biovores and the tyrant (but it had two wounds on it) I have never seen a nid player who didnt get to mass assault because the orks mass asaulted him. It was great. Put the warboss on a bike ang give him a power claw, make the other 5 bikes nobs. The psco blast on assault which is basicly two turns of shooting and with waagh and power fist style weapons they will kill every thing. I saw that bike squad in one game take out the baneblade, 4 leman russ's, and 4 chimmeras. That squad in a different game took out the carnifex on the first turn, and assaulted the tyrant but rolled very low, the tyrant only killed one nob and was dead the next turn. The orks wiped out the nids in three turns, (1700 point battle) The tactic is stolen from the US Marnes and is called the "bum rush". Have fun.