I don't understand. Is there a monster that has those attributes? Or are you arguing that we shouldn't rely on anything we know about MitD because its possible to construct a possible alternative based on narrative choices the Giant might choose to make?
If there isn't such a monster, then this is just making the guessing game more complicated based on narrative choices the Giant *might* make. Which isn't really plausible, because we don't know what story he's telling and therefore don't know what story points he'd want to emphasize with MitD.