Sir VG: I notice that in the Fillmore sim section, both you and OgreSlayeR seal the upper-left bat lair first, then the upper-right bat lair. Why don't you seal the upper-right bat lair first? When I tested sealing the upper-right bat lair first, I still got an increase in civilization level, even though I'd only sealed one lair. If you're wondering why I'm asking, I'm starting work on an improvement to OgreSlayeR's TAS. Is anybody else working on an improvement right now?
EDIT: Oh, and here's a WIP up to just before one has to decide where to have the angel start building the roads. I saved 164 frames by going through menus and messages faster, using a faster boss 1 strategy, and a different strategy for moving through the second part of Fillmore Act 1 that takes advantage of the previously mentioned method for scrolling forward faster, combined with usage of the jump trick.
EDIT: Then again, which lair one seals first may not matter--once the upper-right lair is sealed, the upper-left lair can be reached without using another construction phase.
EDIT: I found the memory location for the timer that keeps track of when the construction phase happens. It's a 2-byte value starting at 7F91FE. It counts up to 719, then resets to 0 on the next frame. When the value resets to 0, there is some lag where the angel can't move, usually between 12-30 frames, then the construction phase begins. So that's about 12 seconds between construction phases. Notice, however that I said 12-30 frames for the lag, so the lag varies. I did a little testing last night, and as far as I can tell, the lag isn't affected by the angel's position as long as the building location is still on screen, nor by whether it's firing arrows, how many enemies it's killed, or by casting spells. But it is affected by what your building path is. When I tried the two possible routes for sealing the 1st two lairs, sealing the right lair first gave me 15 frames less lag. So if there are two ways to get somewhere that take the same number of construction phases, one of those ways may be better than the other.
EDIT: eh, maybe your guy's route is best after all: somehow I'd failed to notice that if you go to the upper-right lair first, your population growth is much slower for some reason.