YAHOO! Well, I didn't think it would happen, but I managed to reduce the total number of phases to reach level 10 (and thus be able to enter Northwall) by 1. I was able to get out of Kasandora in the same number of turns as before, thanks to manipulation of when they build what stuff, though I had to pick up and use an extra wheat to do it. Aitos was the same as usual, but unfortunately, I had to wait an extra phase to reach level 8. Thus I entered Marahna on phase 34, as in my second sim test, but this time with a higher total population. This time I built towards both the NW and SW lairs at the same time. I
barely managed to get to level 10 in one less phase--my population was 1902 and the requirement is 1900! I can say with confidence now that there is
no way you'd be able to reach level 10 in less phases than this barring unknown glitches/cheats. The amount of timer stoppage involved with manipulation of food and the extra cursor movement may actually be enough to make this method slightly longer than taking one more phase to get out of Marahna and not doing all this food manipulation/extra pointer movement, but it's so cool to clear Marahana (and, by extension, Northwall since there's no minimum population to leave it) in what I'm darn sure is the minimum number of phases that I don't care quite as much.
Here's my WIP. Note that parts not essential to getting the population growth patterns I want are rough as sandpaper; this is a quick and dirty test.
Note to Dunnius though: if you can manage to get 10 structures in the first two phases of Bloodpool, or get 9 without using a bomb (preferably the second choice), and
without delaying the timer more, that would still be nice because that may be enough to eliminate the need for manipulation of how people in Kasandora build. And thank you so much for your Fillmore strategy/ managing to get more souls in Fillmore without delaying the timer. This most likely wouldn't have happened without you.
EDIT: A minor timesaver: I didn't notice this before, but casting earthquake in Marahna to create a bridge to the NW lair actually adds 22 to the soul counter. No need to use any bombs or angel arrows. I could just kill two monsters in the first turn and then do nothing and still get 6 structures!