I'll agree that it isn't at all Stanley's style, but he's been known to have moments of clarity, like the eyemancer linkup. Assuming that was a singular event, Wanda had been manipulating him into seeking out the other Arkentools, perhaps she put the idea in his head that he could work better as overlord rather than chief warlord. It would also fit with her talking about the things she's done in her quest to attune.