The list I came up with: (2000pts)
Mek, KFF, Cybork, burna
Spearhead: Mechanized Assault
2x 12 boys, Nob w/PK&BP
1x 12 boys, 'eavy armor, nob w/PK&BP
5x Nobs, Waggh banner, painboy, pk, big choppa, cyborks and 'eavy armor (wound allocation of course)
Spearhead: Ambush stealth + KFF =3+ cover save..
So we have 3 trukks full of killy outflanking (hopefully) in your face while the walker wall advances with it's 3+ cover save..