I think something that everyone is forgetting is that the only reason they do not wish to go to war with the humans isnt that it'll make them sad or so many of them might die.
It's Cain.
Cain is literally the only reason. Had they never known about Cain before this (aside the next wife...
Aside from plot contrivance, I doubt he'd be able to remove Ares from his dream. It's obviously going to be a typical harem-king thing. Someone as narcissistic as he is won't leave such a perfectly tailored dreamscape.
Hopefully, but unlikely, Slad will be forced to leave him trapped in a...