In regards to the build, what I did in the initial expansion was to lay down my cities three tiles apart. This is the farthest you can space them and maintian contiguous borders without holes or gaps. Once I ran out of room, I started filling in the 'middle' slots reducing the spacing to the minimum. The largest advantage (I think) is that since population chokes up space, I wound up with a lot of specialists (all taxmen). I did at least grab more space than anyone, so I'm #1 in territory. The AI has been paying gpt for ROP's!
This ICS build may not be the best approach overall, but for me, it's good enough for now. Rest assured, I don't pack them in that tight after the reposition phase. The 512 city cap prevents you from going that tight and hitting Domination. It's purely an opening sequence...
In regards to the Infantry, yeah, you're right, I'll probably run into them, but I'm not too worried about them. I do have the Sipahi, remember, and by then their teeth will have been sharpened (promotions).
It's interesting the you mention tech pace though, since that's a primary reason I decided to smack France up. Judging by my end of turn 'conversations' with all the AI, France and Greece alone are doind research. Everyone else is either researching slower, or buying scraps off the table. Between the two, they're averaging 20 turns a tech, so R-Parts should be 40 turns away for them. Of course I plan on it being longer since France should be history then and Greece is next on my list. They've got Sun Tzu's...
And if I face infantry, I face infantry.
EDIT: I guess I should mention that none of the AI have any techs that I don't...