I have the game only for some months now, and the highest difficulty I played with is King, and currently I am trying out all civs in random order. I win MOST of my games, with few losses here and there (watch out Ramses IF he can survive, he is badass cultural threat ). I do "cheat" in some way however, I pick my current civ through an online random generator and then play a "suited" map. So I don't play England or Polynesia on Pangea or Arabia on Archipelago .
In some long time in the future, when I have played all civs and all scenarios, maybe I'll try out Emperor or something higher, but King is challenging enough to not get bored while forgiving enough in case you lose an early city or don't grab 1-2 key wonders.
In some long time in the future, when I have played all civs and all scenarios, maybe I'll try out Emperor or something higher, but King is challenging enough to not get bored while forgiving enough in case you lose an early city or don't grab 1-2 key wonders.