Cottages? No way, man, you already have plenty of those and it's pretty late unless planning spacerace. In fact, I would've moved the capital to Cheju for major bureau bonus. I'd put those 2 spots in and use farms for whips or workshops if planning on SP. With that many cities, you definitely don't need to quit on a DOW. Whip whip whip! You can obliterate the AI with that many cities. Even with 6-8 cities, you can fend off a DoW as long as AI isn't far ahead in military tech.
It may be a bit late for a Cuirassiers rush depending on the AI tech situation. A cuir rush is when you focus on Lib -> Military tradition, mass whip cuirs and go stomp all over the map. Depending on how fast you pulled the rush off (and your military prowess), you could conquer an entire Pangaea map with cuirs. Often, I'll break out with Cuirs and then go straight to rifling for Cavalry and finish the rest of the AI off with those. A cannons rush is also possible for you especially if you already have some siege.