Of the techs available for trade, only Currency and possibly Calendar (prereq for Astro) is of interest to me. Both Washington and Capac will trade Currency for Lit + CoL, and Washington will throw in 80 gold. Calendar can be had for the same price. In fact, they will also throw in Meditation, but I don't think I want that.
Washington also has MC, and Lizzy has MC and Compass, but neither wishes to "start trading away this technology just yet." If this is because of the Colossus, then we could gift Copper to Washington to improve his build time and hence to lift the trade restriction sooner.
Philosophy must be known to someone somewhere (Taoism founded in 1000BC). But possibly not on our part of the world, as everyone we know is Judaist or Confucianist.
It does not look like we will be able to get to Lib as fast as the plan says. And since we won't, I would put Drama in the tech queue so that we can start on the Globe, and trade away our luxes.