Its also worth remembering that Gaius was actually still standing at the end even after we broke Ultima. Its just he couldn't get clear of the exploding building.

Zenos is almost certainly going to be a monster but monsters can take a lot of forms. My hope his is arrogant but his arrogance is founded in actual ability, and that he is cruel but not because he has insecurity issue and rather just doesn't care about the wellbeing of others. I am still betting we find out he either has some form of powerful patron he cut a deal with or he stole the power of some being in Doma somewhere ala Thordian eating Ratatoskr's eyes. Going to Doma for allies seems stupid. Going to Doma to search for the secret behind something that makes him powerful makes sense. Maybe its linked to the whole 'spirits inside items' thing. Maybe his Katana hold some type of powerful spirit.