It's not number crunching. It's just grunt work and it's essential to get off to a good start.
Each one of these sequences has pluses and minuses. Let's look at each one.
1. Redbad's: Gets out exploring earlier than I do in any of my mine. Less money spent on the granary.
2. My first: makes better use of the workers and gets three warriors. Redbad's proposed change makes four. However, this is the slowest of them all.
3. My second. Gets the settlers out faster than the first, at the same time as Redbad's. Only two warriors though.
4. My third. Wastes no worker moves at all and gets the first settler out a full three turns faster. However there is only one warrior and the settler will have to plunge out into the unknown w/o any knowledge of the world at all. A true farmer's gambit
IMNSHO, my second one is definitely superior to either my first or Redbad's. WRT Redbad, it is more efficient. WRT my first, it is faster. However, I think the third is the best of all. The improved worker efficiency is nice but the real advantage is three more turns to a settler. This is simply huge. If nothing else turns up, the tile north of A looks like a pretty good spot for a town. It will eventually get the fish and immediately has the
oyster It can work A for all but turns 33 and 34, substituting the
oyster for those two. By the time London needs A back again, it will have its own iPlain.