Yes, I quite enjoyed the other ideas as well. I do forget that turret K costs have been reduced, I should have a few new options.
I'm uncertain of the use of Heavy Bomber Starships for this role, simply because I'm more fond of Plasma Siege and Heavy Bombers than even the Zenith or Spire Starships. That said, not all AI types warrant unlocking higher mark Heavy Bombers so that is a good idea when I'm not facing a Fortress Baron and Turtle. I plan on switching to the Spire Hammer and something undecided AI, so I shouldn't be depending extremely heavily on Heavy Bombers any more, maybe just bringing along some MK2s with my mobile forces.
Something I have found fun in the past, not -especially specced for zombards or maximum efficency, but has some hilarity: Plasma Siege Starships, Riot Starships (tractor+shield), Zenith Spacetime Manipulators, Spider Turrets. You can do some wonderfully trollish although not micro-free stuff with lightning fast 200+ speed units. Annoying Zombards? Haul them to your turrets. Annoying bombers? Haul them away from the forcefield. Particularily best for hacking an ARS or other similar fun, you can throw in some minirams, cutlasses, vampires, shredders, autobombs for additional ludicrous. Be sure to enable autokiting for your 'slow' plasma siege starships.