Walkthroughs for custom maps.

The cavalry is built on day 114 and the angels on day 116, though we end up without the Castle. After 5 cavalry appear on day 114, clearing the respawn becomes a walk in the park.
It can't be that summoning this unknown boat makes the map impassable? That aside, it's an interesting and very cunning idea — you play for a dozen months, and then realize you made a mistake in the first week))

According to the Prospector, all computers have the summon and sink boat abilities, so even if something gets flooded (especially for enemy heroes in the Underground), they will still summon a boat for their movements. So that's not critical, I think.
I place the angels on day 117, and they are not superfluous!

As of now, I've leisurely played through 11 months. Results:
returned the moon to the angel respawn, opened various guards, Gelu is freed, killed almost all the green players (except Torgrim), almost all the necro players (except Tanta and Lord Haart), almost all the blue players (except Kilgor), I have Town Portal, Resurrection, Clone, and Prayer.
Almost everything is broken by bears on this map; with other units it's very difficult. So far, the map is more than passable.