Crowley never would admit it out loud, but her confidence in him, in this plan, it helped him feel more sure himself. Because as much as he knew Ruby so desperately wanted something to work, she did still have a brain, and wouldn't jump at the first possible idea.
Case in point, some mythical back door and angel gossip.
"I know you will, darling. You, Jules. Figure if you two are the center of things, and there's enough people passionate enough about their missing people, it should generate enough power." Magic, power, so much of it came from emotion, from passion, as represented by blood. As long as balances were looked at, and enough feeling generated, the theory was sound.
He half laughed, though there was no humor in there, just tiredness. "You know it'll cause some conflicts. Easier to deal with will be the people bickering over who should go for who, lovers or family or whatthefuckever." As long as there was someone for each, the who didn't matter. "Not to mention that we'd need an angel." An angel. Probably Castiel, but it was the angelic power they needed more than specifics. "You and I both know the issues there could be with that." Maybe he should start to send feelers out, see if there was any way to find Anna.