ThaneWulfgharn said:
Haven't played the mod, but according to the books:
Most of Stormland soldiers, were "green boys" in the desire for glory."The Knights of Summer", Caetlyn calls them. They did not make a tough force.
Stannis, on the other hand, fielded skilled Lyseni Pirates and Heavily Armed Knights called Queen's Men.
Renly fielded the largest army in Westeros with the combined forces of Stormlands (minus the few loyalists) and the Reach with well over 100k troops. Experienced or not, they would have rolled Stannis and taken King's Landing with ease by sheer numbers alone. Stannis knew he couldn't win against Renly on the battlefield, which is why he became desperate enough to lean on Melisandre and resort to her magic. The Tyrell army withdrawing from the war after Renly's death and then fighting for the Lannisters at the Battle of Blackwater was the biggest deciding factor for Stannis's defeat. Catelyn's remarks were more about their naive attitude (not taking the war seriously, holding tournaments every week, taking months to march anywhere, etc) than judgement on how formidable they were. Even Robb knew how much of a significant factor Renly's forces would be, which is why he sent Catelyn in the first place and at this point, he and his army were pretty proven on the field and yet taking King's Landing or Casterly Rock (despite the dumb comments in the HBO show) without help wasn't even a remote possibility for the North.
I haven't tried this mod either, but ideally, I'd hope that the gameplay is scripted (as best as possible) to play out exactly how it does in the books unless directly influenced by the player themselves (ala Lord of the Rings: Total War). Otherwise, with or without an allegiance with the North, Renly's army SHOULD completely roll Westeros every time unless he dies when he's supposed to.