Okay, on the current game, I think I am proving that Regent is tough enough for me. I create a Small map with continents at 70%. I picked Persia to play. The map has 2 big continents that started with 3 civs each. I have expanded on my continent to dominate it. There are 2 remnant civs on tundra at the North. See first image. The other large continent is split between the 2 other strong civs. Arabia in the South (pink on map) and Koreans in the North (dark blue). At this point in 1630 AD I have galleons and a few frigates and have started building a few ironclads. Land units are cavalry and cannons plus a few riflemen and muskets. So this is a decision point. Where do I go next to expand (goal is a domination victory)? Who to attack. Arabs are 1st in points, about 150 ahead. My Persians are slightly ahead of Korea for 2nd place. I tried attacking the Arabs, a shorter sea voyage. I proceed in taking them out but it takes a long time. War weariness forces me to sign peace twice before it is done. After capturing capitol and Damascus it goes faster at the end. Culture flipping was a problem along the way a couple of times. So then I prepare to take on Korea. The cities taken from Arabs are all at high corruption and contributing next to nothing. I had paid to rush temples in at least w of them to get the culture expansion. The Koreans are a couple of techs ahead of me at least. And they had built a fair number of wonders along the way. He has a city with pop of 20 just across the land border so I aim to attack there. K has built up a LOT of troops. I get a counter-attack immediately with about 30 units. Also he sends out ships in stacks of 3 or 4. I think he had destroyers and a couple of carriers at this point. He uses them poorly but they are still impressive and need to be avoided. I try to blunt his attack as much as possible with siege weapons and troops. This reaches a stalemate and I try to build up to take the offensive again. Then I start getting hit by bombers first a few , then groups of 4 or more. I can't stop them. The damage and attrition is too much. So I take a save and abandon this approach. I go back to the save from 1630AD and prepare to attack Korea first. Also I eliminate the Portugal civ from my continent. In short this does not go well either. I am putting all I can in invading Korea and holding one city in his territory. I am doing pretty good at using cannon (and some artillery) to wear down his troops and cavalry and infantry to kill them with not much exposure. And I'm getting little invasions on islands and things. I can see it is slipping away. I can post a save file if anyone is interested. I'm sure there must be better approaches. Probably should build larger attack forces. But I get worried they are building up just as fast.