The player of Set was an idiot. He didn't build enough military units (slingers), and wasn't aggressive enough. He would have given himself a better chance if he had used slingers to counter Toxotes. Instead he never micros them or maneuvers- he just sits there while getting diced up.
Also, his use of god powers was extremely lame. Why not use god powers along with your massed units/defensive fortifications?
Oh yes, and I love how he used camelry against archers. That's a new one to me.