Once you get to a large number of cities, and we are medium big imo, you have to specialize the cities. Much depends on chosen victory condition, imo, so that is a bit of a challenge here. At this stage of a solo game I would start to add to the city names, army, navy, science, gpp, etc., so when I get to a new build, I have a starting point from which to evaluate.
Basic infra for every city is gran/forge/ch, that's it imo. Coastal cities get LH. The AP adds Temples as options where useful if the 2 hammers helps get to a 25% bonus for an effective 3. Normally I don't even build temples, I would just whip the cities smaller to save on maintenance.
I would approach the cities this way going forward in the short term,
Cities:
Athens: Full infrastructure
Lakeside: units
DoubleGems: units
Beaver Isle: navy
Tripple Fish: GPP + secondary navy
Whorses: units
TriClam: secondary GPP + navy
Popcorn: commerce
IronWoll: Navy
NorthFish: units
Nongoma: LB > basic infra
ShakaWhales: basic infra
The Hague: basic infra
Ulundi: basic infra
NotuMg: basic infra
New cities: basic infra for a while. Get worker support and WB's from closest navy city
Unit cities get barracks.
Navy cities get drydock when available.
If/when we don't need navy/units, those cities build wealth, exception is Lakeside and Ulundi who always build units.
We will eventually want in the neighborhood 20 galleons minimum I would guess. We also want the production capacity to produce 3 units per turn continuously. Lakeside with the HE and Ulundi with the 2 settled GG's make sense for non stop troop production. I would whip the temple at Lakeside if we hit the happy cap there. Probably need 5-6 cities building units to get 3 per turn.
3 Fish needs buildings that provide specialist slots, so Market and Observatory whips at some point here makes sense.
For workers,
As I said before, I would not build any new cottages except at Athens. I would farm/mine/watermill/workshop/chop forests.
I would work the Temple builds only where needed to get 3 hammers or for happy cap reasons.
I would like to get all of the other civs infected with Christianity in case we can go that way, so I would like Missionary builds worked in somewhere.
I would always prefer to whip the unit and overflow into the building instead of vice verse because you get the use of the unit sooner.
No Monasteries except Athens + 1 more somewhere in case we need to missionaries in the future when we are out of OR.
Athens Continue Oxford, 2pop whip a temple once the forrests are gone.
Workers > Cottage (also replace the farm West of the wheat)
You have to be less than 20 hammers invested in the temple to 2 pop whip(100% bonus), I would do it now as you will be at the happy cap in 2 turns. You have to come off the south mine to stay under 20 hammers.
Lakeside suggest we invest in Monastary/Temple as well as a Aquaduct
Workers > Farm
I would build units here, the health problem I caused by trading away our corn for sugar from Mao. My bad, but you can fix it with the trade to Liz. 
Double Gems 2 pop whip a Monastary, finish Treb
Workers > Farm
whip the unit > temple
Beaver Isle gets Crabs to grow, 2 pop whip a Temple and Monastary, use overflow to finish the Galleon
whip the unit, we are trying to grow Athens asap, I would leave the Crabs there.
Triple Fish 2 pop a Temple for an extra specialist slot (anything better than a spy)
Finish Galleon
Spy specialists are actually quite good imo, whip unit > Market/Observatory
Whorses 2 pop whip a Temple, overflow and finish Galleon
whip unit 1st
TriClam 2 pop whip a Temple, finish Galleon
whip unit 1st
Popcorn, doesnt have Christianity yet, slow build a Settler for riverside. Finish courthouse
Temple here + Eng gets us to 20 hammers, I would keep it growing and maybe get settler somewhere else. So CH > Temple imo
WB for Kwa could come from Ulundi or even chop a forest on site.
Rest looks good except for the cottages.
Updated PPP and pause at 5 of 10 turns please.
Lakeside should stick to troops virtually the whole time. Monasteries not so keen on depending on when we plan to get Sci Meth..
Markets are barely ever worth their investment if it weren't for the happy they bring in large cities. The added money might make sense in a bureau cap, a good shrine city and in your corp HQ but that's about it, imo.
