I think we should try for 20k culture. To my knowledge, we haven't done that yet, and if we were Babylon, it would be quite easy (so we shouldn't be Babylon of course). I remember that was our idea in DG4, but we didn't exactly go anywhere with it. Of course, this will take some diligent planning early in the game to pull off, but we should be able to do it.
I would like the histograph idea except that it would make the turnchats way too long, and most likely we would have nearly won the game well before 2050, resulting in a boring milking session for the last couple of terms.
I guess that's not quite topical, but I figured I'd blare it out anyway.