I started playing today after seeing the game on Kongregate, and quickly played through the easy levels. Eventually also cleared the Crazy Challenge after a few hours and some luck (at least I assume, can't see behind fog)
So... Insane Challenge, obviously not supposed to be easy, I've read up as much as possible, but I keep getting ass-kicked. I'll give you a to me normal scenario.
I obviously get the 3 first bonuses asap (2-3 turns). I then expand to the Middle East, East China and East Africa next, followed by West China, Caucasus and South Africa and more or less simultanously West and East US. Before I interfere with the AI I also end up controlling Central Russia, almost all of West Russia, most of Europe, West Africa (naturally) and parts of Canada.
What happens now is I usually meet quite heavy resistance in Scandinavia, slightly stalling my progress in Canada. Eventually, when Ive captured Europe, West Russia, and possibly Scandinavia, I tend to get overrun from every direction at once. I forgot to mention, but of course I keep an eye on Svalbard S, usually abandoning 25 or so when necessary (around turn 12 or so).
I usually need my forces to break through Scandinavia, and when I've massacred the whole place, South America, Canada, West US (from Hawaii), East US, Central America, Central Africa, eventually South Africa depending on the abandon, India, and also both Chinas, from Japan.
My forces are simply not enough, should I aim to block off choke points such as Anadyr N quicker, or is there any other major fault I'm making? Because despite trying for several hours (I know this is not a lot compared to a lot of others) I haven't even gotten close, my best income so far has been in the 70's area, but it's all down hill from there...
Any tips are welcomed, I've read up quite a bit already, but it seems it's not enough!