It's debatable whether it's worth bothering to "transition" to a CE.I'm leaning towards Domination because, frankly, that seems like the best way to highlight Cyrus' traits--Imperialistic (more Great Generals) and Charismatic (cheaper promotions, less WW thanks to the +1 happy).
I'm glad to hear that everyone thinks the transition to a CE is now due. I think the next round should focus on that as well as obtaining one or two key military techs (Steel and Military Tradition) before taking on Huayna. I also think that if Huayna is the target, it's time to cut him off. I don't want to trade Steel to him! Even if I can get Nationalism for it.
time.

A full transition is indeed not worth it. Considering your rather massive production ability, steel should be plenty to lead to victory against HC. Just use the cottages on formerly mongol land and make a hybrid. I would even advise Representation over Democracy considering its admitably smaller boost will be iminent rather than waiting for town to mature.It's debatable whether it's worth bothering to "transition" to a CE.
At most you need 4 more techs (steel, nationalism, replaceable parts and rifling) and then you're done. Is it really going to speed things along to race around cottaging everywhere?
If you're going domination do NOT transition to CE.
You want the farms for whip/drafting and then population boom.
As others have mentioned you only need a few more techs.

/turn and beef up research. The bonus infrastracture construction OR gives is partly wasted because the newly "aquired" cities that need it the most dont get it. Plus, frankly, shouldn't your HE city keep on making trebes(in time to be upgraded to cannons) or at least grens rather than buildings.
each seems impossible aside from a GM. Still your 7 veteran trebs + any you make while researching steel can be turned to cannons for a very reasonable 100
a piece and should prove invaluable. Much more so than drafted grens delaying till nationalism is researched.
I disagree with your earlier comments (I don't remember the thread) that you aren't ready for emperor. I think there are just 1 or 2 holes in an otherwise very solid game that make emperor just a little too tough. One of these holes is not using theatres and the culture slider to fund mid and late game wars. Another is not always having a focused tech path. I often see you switching techs mid-stream. It doesn't seem that big of a deal, but researching a tech half-way and then switching can often have a high cost. Many times, that tech you switched from wasn't so important, and you could trade for it a few turns later and you just wasted 4 or 5 turns of beakers. Certainly you agree that 4 or 5 turns of research is a big deal (in this game would have won you the lib race).
I'm also on the cusp of the monarch/emperor border. you are dominating the monarch level just like me, and struggling a bit on emperor. Rather than stick around at monarch, start playing at emperor and if needs be, get your ass kicked a few times. Nothing improves your game like better competition. If you really want to improve, you should be playing at a level where you win only about 50% or less of your games. You have been dominating Monarch, so you should move up. Usually getting owned teaches you more than just another easy win.
Granted, a GM would be nice, but not essential. Now that I have 2 GGs settled in the HE city, I can easily churn out 4 Accuracy Cannons to replace their Catapult equivalents, and without a civics change. Same for City Raider II Cannons that are within 1 XP of CR III.Its a shame none of your cities focusing on specialists employ merchants. Though you could get your next GP about in 20+ turns just before steel chances are it wont be a GM even if you focus on merchant specialists now. Upgrading your cats to cannons would make an upcoming war very easy but at 300+each seems impossible aside from a GM. Still your 7 veteran trebs + any you make while researching steel can be turned to cannons for a very reasonable 100
a piece and should prove invaluable. Much more so than drafted grens delaying till nationalism is researched.
That was a deliberate decision on my part, and I would contend that it was not a mistake at all. Very simply, I could attack across the river and take the city on the very same turn that I declared war, or wait a turn and attack from the hill. I decided to trade speed for slightly worse odds. I think I only lost 1 Trebuchet and Genghis never really mustered a strong defense of any of his cities or an effective counter-attack, so I think it was worth it. While I may be giving the AI too much credit, there's a great deal to be said for catching your opponent unawares and off-balance and keeping him there.The one huge error I saw last turn set, and surprised no one else noticed it AFAIK, is that you attacked the first Mongol city across a river for no good reason. Why not attack from the hill N of the city?
I think S has mentioned that he plays offline games at both Monarch and Emperor. One of the main reasons he's keeping the ALCs at Monarch is for newbies like me. Especially with a new expansion coming out, there will probably be a surge of new players, and these games will help US more if they're at a lower difficulty. Also, keep in mind that S also is playing leaders he doesn't use often and is trying out various strategies and gambits - games on a higher level would need to be more formulaic and would allow less "exploration" of lesser-used tactics.
All this should be in the thread linked to in S's sig, so back on topic ...