I rate Sistine's better than JS's, although the lack of JS's is killing me in this one game. I managed to build Sistine but the AI started to get smart and beat me to Magellan's, JS's, and Newton's nearly simotaneously. I have a wide Mercedes-Benz-like empire and over on one "point" I have to build other improvements and can't build Cathedrals... Longevity IS a lot better in the Industrious Ages but Longevity is very time-conscious. It is only now that we've gotten better at medicine and improving health, and because of that our populations is booming faster. For gameplay purposes some mods have allowed Longevity to be built in the Industrious Age w/ Sanitation. Having Pyramids + Sun Tzu's + Hoover Dam is a godsend when capturing cities on the same continent. I could have spent 60 turns building a granary in a newly conquered city; but I don't have to thanks to the Pyramids.