why stay away from mech? something i would suggest: walkers!
Defilers are
1-cool models,
2-intimidating,
3-BAMFs
and dreadnoughts are sick.
keep your bezerkers away from tanks. the fist is good for emergency dread killing, and i think thats what its there for....in which case good boy
noise marines are good.....maybe you might want a sorcerer? you dont really need to worry about anti-tank too much in such low points games....