ThERat
Deity

I think the issue with SG's in CIV is that your teams needs to play very coherent, but with the multiple choice to MM cities, it's very tough.Also civ4 is too complex for a simple SG.
Too many possibilities,too many choices.
I know Greebley is a cottage fan, so when we played the Rat series, we were sticking to the plan of expansion with economic built up then followed by mil campaigns.
In the acid/mutineer SG's, we went for whipping/axe rushes etc. This worked as well.
The games that do not work out are the one were people have a different mindset and this here is a good example. It was also not wise in retrospect to attack Russia that early.
Anyway, overall, SG's that were so fun in C3C because people have different styles is so counterproductive in CIV. It's best to play a SG like a SP game, but what's the point then. The only reason I still play a few of them is merely the fact that I can't play CIV much longer than 10 turns without severe fatigue (too slow and laggy really)