Hi I have been playing a modified broken lords faction with the main aim of completing the main quest. I did not cheat and read about the quest until just now and I find the ultimate element (I am at the penultimate) requires a full 8 strong army. Unfortunately I have "anarchists" in my modified design which reduces army size by 1 (to 7). Am I screwed or is there a way around??

incidentally, is there an easy way to find the 4 roaming armies, specifically the fourth one?

Hello!
Perhaps it is worth trying to somehow increase the size of army by various improvements. Maybe the hero can take special equipment or there is something in the technology tree. But with the factions created by the players, it happens that they do not fit the main quest and it's can't be done.
Today I bought all the latest DLC and I will check out the new gear. If I find something useful for you, I will write, because I am related to the Lords of Dust too. :D