You can also pick raze rather than puppet on the first capture, even if you think you might puppet on the second capture. That lets you sell off an extra building. Really try to capture with a unit that can retreat. Using the city as a buffer this way lets means the AI is losing an extra or units every turn.
This tactic works really well if the city involved is a CS, as the city pops up stronger, can bombard, and makes it easier not to loose your capturing unit. Your enemy AI will be losing an extra 2-3 units every turn.
This tactic works really well if the city involved is a CS, as the city pops up stronger, can bombard, and makes it easier not to loose your capturing unit. Your enemy AI will be losing an extra 2-3 units every turn.