Freeguild/iron Aresenal. Sounds a lot more fun plus you can take dwarf cannons as well.

Well I don't know if hand gunners are core but you should have no problem satisfying the batteline via the infantry unit well if you are playing points that is. I feel having some infantry to protect the gun line will be important and the formation you set them up in. Since we are still in a magical world where monsters can charge half way across the battle field. *looks at orruks*
After I finish up Death I am planning to do a sigmarite army with devoted of sigmar making the bulk then adding some stormcast to take on the big foes.