No need for reminders from the Witherer, Li Yao already had a plan and positioning in mind. The outer cities naturally belonged to the Camp, or rather to the Undercity.
The more inner regions also had to be attacked, to make everyone believe that he was targeting the Lizardmen's masters, fighting all the way through.
The Lizardmen controlled only three maps, insignificant compared to any Race of the Camp, but fairly decent in the Chaos Camp. Had their main city not descended greedily, they could have acquired more.
To better utilize resources, the Lizardmen cities were densely built, frantically absorbing map resources, aiming to strengthen themselves and contend against the three Camps.
Player guilds naturally had their bases in these locations, so by entering the Lizard territory, one would find Lizard guild bases scattered throughout.
Just as the Lizardmen detested Li Yao, Li Yao also had no regard for Lizardmen, dealing with any guild base he encountered along his route.