Pre: (1555AD save)
Name and fill armies to 4 units.
Locate MA, note it should not be here as this is not a very high shield city and will not build armies very quick.
Switch Farund to LB to get something out of it before gifting or abandoning. Prefer to gift to get units back with no hassles.
Switch builds to get things of value, such as workers. Need a rail system asap.
In that vain, I would have planned a bit prior to Steam. I would have migrated most of my workers towards the core to start rails. If it was too long of a trip, then gather them some place to focus them on making rails. From the center to the borders, is my normal mode.
Wars and such can alter that plan at times. The most important thing to have in a large map, is to get a rail system to the front. Now you can bring those cats/trebs/cannons to bear in battles and hurt any invaders on the cheap.
Right now they are spread out and will not be able to be used to any great effect. 65 workers is no where near enough for over 100 towns on so much land, much of it not even with roads.
I would want more like 200 or more and then I could make some progress. Now I have not gotten my bearings on the research status, but I would have gone for RP ahead even the race to ToE.
Infantry and arties will be game breakers and savers here and the 50% faster workers, turns 200 into 300 or 65 in about 100.
You do not have to be first to SciMeth to get the ToE. Just get a prebuild going and get the tech in time to switch. At this level, that should be doable.
Pulling together all the far flung workers and going through all the builds will take hours.
This is what makes helping players with huge maps a hard job.
Update, ok I have corralled all the workers. I mean they have been allowed to finish current task or been stop and given better jobs.
Switch a cav to a settler to get the land open by Leptis under the border. You really cannot play on such a large map and not have some settlers on hand to fill openings that come up.
Next job will be to fill the 5th army and then grab all the units and get them where they can be of use. I did off load the galleon. I stopped all galleon builds and did switch one to a frigate, probably a bad idea. I will use galleons in hand to rush something.
No need for ships at this point you have not take over the land on this mass yet. The two islands I see will never come into play, ignore them.
The whole point of the last time I went through all the towns with a change log was to point out the concepts. You really do not want to get to the Industrial age with so much land not improved.
If you had the proper number of workers and used them well, most of the land should have roads, all the core towns would have irrigation or mines on all worked tiles.
This is the way to be strong and get the production and research to stomp the AI. Of course I wold not have research communism and not switch to it.
This would have given you at least two more techs and more structure/units from the shields and gold lost switching, not to mention the better income from being a republic.
As I have mentioned before you just do not want to make more than one switch, unless religious. This mean no commie. The games that it would be useful are too few, just forget it.
The poor aspect of going commie it it comes in the IA, where you should be doing quite well and having a large production base. That will be lost for many turns of anarchy.