I would like to point out that we will not be able to keep this research speed for a long time, so we need gold production and razing/capturing Delphoi would give us some breath.
Another thing i was thinking about is that Egyptians are generally less military strong and they hold a lot of gold tiles, so conquering some cities in Egypt should be our first priority after the Greek war.
Also there, we need to carefully choose which cities to keep and which cities to raze, and when to do it.
What kind of victory are we going for here?
If we were going for a long-term one I’d suggest razing most of Egypt, leaving only the former capital and a coastal city. No matter which victory we’re going for we should raze Delphoi in Greece too