Dumb Ork army idea.

Dread Mob
Warboss in mega armour
2 Big Mek in mega armour
2 Meganobs
3x Dreads
3x 6 Killa Kans
6x 22 Gretchin

Any ideas to refine it?
I don't want any Orks that aren't in Mega armour or a robot, nor any wheeled vehicles. However Grots of any amount are ok.