Levitat - after reading your walkthrough, I want to clarify some points...
Correction: Roland connects with everyone without any problems; the main task is to recruit the Silvers. And they only join if Roland has a certain amount of meat.
2nd point: The dismissed Vey, and then the one who was bought back, reached the Left Necropolis on the last map.
3rd point: I bought Piga because he has a decent starting map.
P.S., Only in the first save, transfer the army from Gem to Roland.