What's a good way to counter Speed Freaks using Deathwing/Loganwing? Here is the core of the Speed Freaks list (1500 points):
1 Battlewagon with some ork that gives anything within 6" a cover save
5-6 Trucks full of boyz that follow the battlewagon around
Gazghul
How do you counter a list like that with an elite assault army?