I hope after watching the video, the question about the Shaft can be resolved? Or are there still some nuances?
Added 13 minutes later
MrLucefer, requesting advice.
1. How can I use cheat codes to check who and how the neutrals will join? View Enemy towns?
2. Or can I just take Saira (Kira) and everyone will join?
1. Look in the "Prospector" program to see what loyalty the key creatures have. Then, calculate mathematically whether they will join or not, taking into account attack/diplomacy skill/presence of the same creatures in the army, etc.
I don't know how to do this correctly.
2. This is how I do it. Using cheats, I give the hero the "Vision" spell and an expert in any magic (to increase the radius of the spell), infinite turns, a starting army, and I go around all the necessary creatures and see if they will join or not. If "no," then I increase diplomacy and repeat again. If it's still "no," then I use an expert in diplomacy.
If I need to go to several places at the same time with 2 or more diplomats, then I determine by the method of "trial and error" the necessary size of the army so that the rest can be sent with another diplomat in the other direction.
Something like that :)