A map with tons of hive golems and botnet golems sounds pretty amazing, I've gotta say. Though maybe replace botnet with cursed golem. That might get a little more expensive to repair than I'd want though, what with the higher attrition.
So long as the AI doesn't have gravity effects, I know of no other golem that can clear a planet as fast as a full hive golem (though yes, it does take time to build up).
On a similar note, are there certain golems that don't spawn for AI Exogalactic waves? I can't say I've ever seen a Hive, Botnet, or Cursed Golem in one.