Here is my current list that is going fairly well, with a record of 2-1-1 (I can't believe the necrons had more objectives than the orks, but the orks didn't lose as both his commanders were dead so there were no witnesses to say different. )
BIG MEK; Heavy, Cybork,Kustom Force Field, BP, Burna
TROOPS
1: 12 BOYS; Shootas, 1 big shoota, NOB, ‘eavy armor, boss pole, Power Claw.
TRUKK; Red Paint, ram, Plank
2: 12 BOYS; Shootas, 1 big shoota, NOB, ‘eavy armor, boss pole, Power Claw.
TRUKK; Red Paint ram, Plank
3: 12 BOYS; Shootas, 1 big shoota, NOB, ‘eavy armor, boss pole, Power Claw.
TRUKK; Red Paint, ram, Plank
4: 12 BOYS; Shootas, 1 big shoota, NOB, ‘eavy armor, boss pole, Power Claw.
TRUKK; Red Paint ram, Plank
FAST
1: The Green Baron
2: Dakka Jet, 3 Twin Link supa shootas, Ace
3: Burna Bomma, 4 skorcha missiles
ELITE
1: 15 Burna Boys, three are meks
2: 15 Tank Bustas, nob with tank hammer and boss pole
HEAVY:
1: Battle Wagon; red paint, grot rigger, Deff Rolla, armor, 2 big shootas
2: Battle Wagon; red paint, grot rigger, Deff Rolla, armor, 2 big shootas
3: Two Gun trucks with flakka guns