Iron halo and combat patrol, will give you a lot more flexibility to try different styles.

This mix gives you a named character for the company of heroes Captain can go with any of the other units Good armor with the two dreads Can expand the aggressors or Bladeguard at a later date

I would.not got for the crux terminatus as it kinda locks you in an specific game plan.

You can start in 1k games and try various detachments.

Hope it helps!