Gender: Male Location: In Luna's mane, chasing STAAARS!
Even Arbiter owned Brute Chieftain and as far as I know, Cyberdemon would own both Arbiter and Chieftan at the same time. Cheiftan doesn't have the soul cube and the Cyberdemon is packed with a built in minigun and rocket launcher and gravity hammer won't do **** since it ain't no soulcube.
Gender: Male Location: In Luna's mane, chasing STAAARS!
Even if Cyberdemon can be harmed by things other than the Soulcube, he's still gonna own the Chieftan since nearly anybody can beat those space gorillas.
Arbiter would have to climb Cyberdemon in order to reach his head and even cloaked the Cyberdemon is gonna know where Arbiter is because how can anyone not know that something is climbing on them?
To be honest SuperLuigi, you're not very good in arguments.