Answering your post in Emperor challenge lineup - I am a player who currently tries to play games on Immortal, Emperor seems too easy to me these days (though I cannot always win. I am a reroller xD). Anywho, I feel that since Emperor is not as hard as immortal and deity, we could shoot for weaker civs. What about a Denmark game on a naval map or maybe Ice Age (I think it produces snaky continents), so that Denmark's UA and UUs could be used to a good effect?
[EDIT] Oh crap, I thought I was writing a PM ^^