Bone, respect to you for testing!
Regarding the gnomish strategy against Barbarians, I think the tactic is designed for Throne of the Elements (TE), where neutral morale is turned off. In TE, starting as Vistan, they upgrade Lizards to level 111 without thinking (damage increases and ammunition is added) and, without morale, they attack any gnomish settlement.
As for Shades of Darkness (SoD), the start there isn't as easy... and you have to be more careful when attacking with morale. It all depends on whether we want to take such a risk. It's easier in TE. I even managed to capture the maximum number of gnomish settlements as Fortress on level 111!
P.S.: If you're going to describe something, don't forget to include screenshots for clarity.;)