I am #1 in most F11 categories now - the despotism penalty is making denyd's Golden Age much weaker than it should be. Since denyd will see he is #2 (or #3 in some disciplines), he may think he is being outproduced by you and will be very hesitant to attack.
I have 8 turns until Chivalry. I'm building a few horsemen for upgrade now, but once Chivalry comes in, research will be off, and there should be nothing but military at that point (maybe 1 town devoted to a couple of the better wonders). Do you think that is soon enough?
I think we both should soon consider expanding up more instead of out. Maybe devote 1 city at a time to building a marketplace and then add workers to get our cores to size 12? I only have 4 luxuries still so I could use 1 more. I have located 2 sources of silks and have started a road, but they are not close, and it will probably take me at least 10 turns to connect them. Do you think you might be able to claim the spices that Cyc tried to take, or is that too dangerous?
I think you should be OK from denyd for a while. Your gallics and catapults are underrated by the military advisor, and I think denyd will have a hard time approaching your territory with nothing better defensively than spears.