I've put the cities near the centre of each country's triangle of uncapturable fields so they should always have plenty of protection. There is only one capturable field near to each city (A18/A28/A38), so these should see a lot more action in this setup. HT said he doesn't want spawns into the new city so I'll spawn to the HQ from each of the nearest coastal V bases.
Once I have altered the arena map I'll repost the terrain here.