Pretty sure that we need sailing for the trade route connection.
I logged back in and finished the corn since it only had a turn to go. I also think we should whip Volantis but I didn't do that yet; just paused the game. The corn farm gets us to size 3 by next turn and only delays the roading by a turn.
I want the roads not just for the copper, but for the trade route income. We get an extra 2 commerce/turn once we get the first city hooked up since the two cities will both have a trade route with the other, and another 1 commerce/turn when the third city gets hooked up to the network and gets its own trade route.
We want to finish the road to Tyrosh with the worker we send that way, otherwise we waste a worker turn by either half roading the plains, moving 2 tiles to the cow and waiting until the next turn to start pasturing, or moving 2 tiles to Tyrosh and pasturing the next turn.
Pasturing the plains cow is really only worth 1 more food and hammer until we get to size 2 since we're gonna be switching off the deer tile which is 2f 2h. So, we lose 1f1h for each turn we delay pasturing the cow and 2c for each turn we delay hooking the first city up and 1c for hooking another city up. I think the 2 food and the extra turn of being size 3 make up for the turn of delay and 2 commerce loss this causes.
There's several micro paths we can take and none of them differ by more than a few f/h/c, and I'm trying to add this up in my head, so here goes:
Option #1
T46: Volantian worker roads sheep
T47: Valyrian worker to Tyrosh, Volantian worker 1NW and road, new worker finish sheep road
T48: Valyrian worker pasture cows, Volantian worker 1NW and road, new worker follows and finishes previous road
T49: Valyrian worker pasture cows, Volantian worker 1N and road, new worker follows etc.
T50: Pasture cows, new worker finish road from volantis to Valyria, Volantian worker 1 turn into road to Tyrosh
T51: Pasture cows, cow bonus kicks in, 2 commerce/turn bonus kicks in, workers do something else
T52: Further 1 commerce/turn from trades comes in
Total: up 2f/2h/5c by start of T53, 5 worker turns for other shit
Option #2:
T46: Volantian worker roads sheep
T47: Valyrian worker 1t into road to Tyrosh, Volantian worker 1NW and road, new worker finish sheep road
T48: Valyrian worker 1t into road to Tyrosh, Volantian worker 1NW and road, new worker follows and finishes previous road
T49: 2 commerce/turn kicks in, Valyrian worker pasture cows, Volantian worker 1N and road, new worker follows etc,
T50: Pasture cows, new worker finish road from volantis to Valyria, Volantian worker 1 turn into road to Tyrosh
T51: Pasture cows, 1 commerce/turn kicks in, workers do something else
T52: Pasture cows, cow bonus kicks in
Total: up 1f/1h/10c by start of T53, 5 worker turns for other shit
Option #3
T46: Volantian worker roads sheep
T47: Valyrian worker 1t into road to Tyrosh, Volantian worker 1NW and road, new worker finish sheep road
T48: Valyrian worker 1t into road to Tyrosh, Volantian worker 1NW and road, new worker follows and finishes previous road
T49: 2 commerce/turn kicks in, Volantian worker 1N and road, Valyrian worker finishes road with Volantis, new worker to Tyrosh,
T50: 1 commerce/turn kicks in, new worker Pasture cows, Volantian and Valyrian workers move to cows
T51: All workers Pasture cows, cow bonus kicks in
T52: workers do something else
Total: up 2f/2h/11c by start of T53, 3 worker turns for other shit
We could also add chops, but it should be kept in mind that extra resources we get from improvements worked continuously will yield more over the course of the game when we start working them earlier, but the chops are the same whenever they're used (well, until mathematics and production bonuses) The same jump in hammers is worth more early game, though, so it's good to get the snowball rolling.
Option #4
T46: Volantian worker moves to silk forest
T47: Valyrian worker roads to tyrosh, Volantian worker chop, new worker to silk forest
T48: Valyrian worker finishes road, other workers finish chop for Volantis
T49: 2 commerce/turn kicks in, Valyrian worker pasture cow, other workers road silk,
T50: pasture cow, other workers 1NW and finish road to volantis
T51: pasture cow, 1 commerce/turn kicks in other workers do something else
T52: pasture cow, cow bonus kicks in
Total: up 1f/21h/10c by T53, 4 worker turns for other shit
There's probably shittons more things we can do but I've spent way too much time thinking through this already.
It looks like #3 is best of the non-chopping plans, but I might have screwed up my math somewhere.