Sorry about the delay; I have too much going on. It took me a week to type this post. I managed to complete a test run of Bloodpool using an alternate path.
http://dehacked.2y.net/microstorage.php/info/544754337/ActRaiser_%28U%29_Bloodpool_Test_Alt_Path.smv
It is TASed except that the angel does not move after directing the people to the last lair, but the messages during that time are TASed. I started the second phase with 5 souls and managed to get 20 before the second construction, without using the bomb!
The idea of the alternate route is that 2 bridges are built before any construction, which prevents field building before the people learn how to grow wheat. The reason was to get around the extra "take an offering" that gets the wheat, which takes 170 frames. This route adds about 160 frames of pointer movement, but it would be faster in theory. But it turned out slower because 6 out of 7 "town under construction" were slower. Also, the population of the alternate route is the same as Zidanax's run at the end of the sim. However, because of the extra bridge, the two runs will build fields at different times. When the alternate route does not build a field, but Zidanax's run does, the alternate route will be 8 ahead, though that will only last until the opposite field building occurs.
I also do not think it is necessary to build over to Fillmore, and I did not do that in my run. The message about Fillmore is 162 frames and the time to build to it in the normal route is about 60 frames. Its effect is the same as the extra bridge in the alternate route. It did save time on Zidanax's run because it made up the population difference on the turn that mattered. But I am going to be able to increase the population of Bloodpool by 4, and because Fillmore's bomb will be used in Kasandora, its population will increase by at least 4, and that will make up the difference, and will be faster.
After I completed the alternate route, I realized that the extra "take the offering" to get the wheat was unnecessary no matter the route because there are 3 opportunities to get the wheat (with the bread, with the skull, and after act 2) and the wheat is only needed twice outside of Bloodpool (Kasandora and Marahna) so the third wheat will be used in Bloodpool, which is needed in the normal route. This means that the alternate route will never be faster.
So now I have begun redoing Bloodpool using the normal route. It will be easy to do since I have figured out most of Bloodpool already. I hope I won't be so busy so that I can finish Bloodpool quickly.