Sorry, but beating the game on Deity with two cities and 3 knight armies would have to take a very beneficial setup. Interesting to shoot for, though I wonder where it might leave you if it fails.
Yes, one gets techs from taking over cities, but unlike CivII it does not seem to happen for every city. I seem to get a tech from the first city I take but not the others - perhaps that's a DS thing I don't know.
My point is that with the correct map on Deity it could be beneficial to beeline knights, and perhaps it allows you to eliminate some competition, but would not (to me) be a strat that will win you the game a vast majority of the time. I believe that the game is tilted to the player who can utilize the gold - get more of it and know when and where to spend it - and with this the English have some very good advantages.
Yes, later in the game when you have ships (fleets) that can properly support you, the results are incredible and should allow you to slam every coastal city. Recall that the ability comes later, however, so I choose to build up and buy myself just about all I need and quickly move from there to domination.
So MKElderGod - I believe that I am making good use of their potential by REXing and do not consider it "nub" status. With Monarchy early, make use of dye and turn it to gold from the get-go. With the Longbows hold your cities early. With increased naval support use your strong ship fleets to win you the game by guarding Atlantis and later supporting every attack on coastal cities.
Still, I'm interested in the early knights aspect and will try to see what might be done there too.