I'd steal Adam and keep him sealed deep underground next to Tokyo with a super highly advanced city above him. The city would be able to retract into the ground when danger approached and I would capture the few angels that attempted to attack us. Then I would use them to create giant robots and force children to pilot them and fight back against the angels. Then in the end I would break down the psychic barrier that separates all of humanity into individuals and cause us all to melt into one. At least, until my son decides not to and the world starts over.