[@Mega Birb] Well, unless you gained something from the place by getting copy machines to print out "Hail Sliske", I presume there are humans who you've enslaved one way or another to get your new powers and minions. Angels are indeed interested in rescuing humans from demons. So, I was gonna propose, "Hey, let us help you take your land back, Machina, on the condition that after we've rescued everybody, everybody gets to choose whether they wanna stay and live under your guys rule, or come with us to heaven." Does that make sense? Or were there no humans there?

And as far as crawling with demons goes, my dream team would be Diana, Tartys, maybe Bastion, Tatiana, Hibiki and Shizuka. Even if one or two didn't show up, that's still a pretty boss team.