TOZ: 50 turns sounds like a good idea. gives good time to get situated and deal with barb camps. I like it.
Flyp: If there's 4 of us, which is what it seems, add in 8 city-states and that makes for a great mid-size map game to me, imo. I could comp stomp on my own time, no offense. 90% of my Civ 5 time has been spent making the AI look stupid. I wanted to organize this game so we could stomp each other. I mean, if you wanted to have some chieftain levels Civs in there to mix things up along with city-states that'd be cool, but I won't make any promises that I'm not coming after non-AIs first lol. To answer your question, Quick.