Only the top 5% of players can consistently get Uffizi, Louvre and Eiffel Tower, and if you're the top 5%, then you can win easily anyway, as Maddjinn showed with India.
You list 3 wonders with wildly different degrees of availability, though. Eiffel Tower is pretty much guaranteed if you Oxford Radio (because the AI's never do that), and by the end of the Renaissance, you should be the tech lead anyway. The Louvre is also not that difficult because it requires Exploration, which AI's usually don't pick, and if they do, it happens pretty late in the game. Really, only Portugal would go for the Louvre, and maybe a couple others. Uffizi, on the other hand, is nearly impossible to get due to several factors. First, the AI's luuuuuv Aesthetics, so expect 3-6 of them be ready to jump on that Uffizi the moment it becomes available. Half of them also enter the Renaissance via Acoustics. Secondly, when you enter the Renaissance, you generally want to open Rationalism-Secularism (unless you play Rationalism-free like me
), so by the time you get to Architecture, you might not have opened Aesthetics (unless you opened it way before). the Uffizi is most difficult to get ut of those, and, oddly enough, the most efficient way to get it is to head to Printing Press, build Pisa, and meanwhile research towards Architecture, open Aesthetics, and use a GE from Pisa to rush the Uffizi. If the AI's have built Uffizi, then you can save the GE, and in case they haven't, you will most likely get it without wasting too much time. Of course, it wouldn't work if the AI's nabbed Pisa, but it is generally the easiest Renaissance wonder from my experience because the AI's go for Acoustics or Gunpowder 90% of the time.