bcool
Deity
I do like the combination of options and advantages the "infiltrate west, then see if GA to rush Philo will work" plan. Reduced revolt turns, more secure HG, faster extra population from HG, and faster access to our "leverage" techs of Literature and Currency are all very valuable, and increasing the security of our 40% espionage discounts are particularly good.
I'm not sold on the value of infiltrating the northern witches. We were going to infiltrate them perforce if the western witches were not exploitable with the city gift. We have succeeded with west, how. We know west will greatly out-tech north (and may already be doing so), and with the religious barriers that will be going up, I don't see all that much inter-AI tech trading going on.
I'm also not sold on the value of two infiltration missions, regardless of who the targets are. Infiltration does offer a good return of beakers for EPs eventually, but a large stockpile of EPs from the second mission does very little (or nothing) for us until the AIs get techs that we actually wish to steal. We knew we wanted very many GScientists for bulbing to the UN, and we have not got one that we might have got. I think we want to use the GPerson we did get to further our strategic goals in a clear manner. A Golden Age does this, I think. Scotland Yard or settling doesn't. Scouting the western witches might do this, but it is unknown.
We should be sure to run max scientists in the meantime in the city that would rush the Gscientist in any of the scenarios.
I suppose another option is to infiltrate the western witches with the great spy in stone city (he could infiltrate on T103). Then we can assess the philosophy situation...
If we think a golden age is worth the risk then we can use the exploring Great spy for it.
If we think a golden age isn't worth it then we have a great spy to continue exploring and if we want to infiltrate the western witches again or to go explore and find the northern witches and eventually infiltrate there is we find a good reason to do so.