Seriously. Aside from the tutorial I've not had a single successful negotiation. Like...why? If they were all 4 star cards or something then I could understand but they, like sealstone cards, are mostly crap that nobody is going to use. Why make something so lackluster so hard to get? I don't get it.
They aren't hard, they are impossible without the chains. Sealstones are ok, but I agree that there should be some chance to get them without chains. Already had that anima sword girl appear more than 50 times, only to fail every time when she appears. If you want free chains, you could use the silver apples, but then there are those 2 daemons up for grabs too.
Can anyone confirm that they are impossible without the Cabal Chains? I have fought various 2 and 3 star ghosts at least 150 times as I completed the story but they have yet to join me besides the daemons before Qing Long.
Its not impossible to negotiate but it becomes very very unlikely. Cabal Chains are your best bet if you think the demon is pretty good but so far, the consensus is that they aren't worth the trouble cept for 1-2 maybe on the later chapters. The events yield probably the best demons for non-cash players and your best bet of keeping up with the community.
So if your thinking about spending money, probably not the best investment to spend it on buying Cabal Chains.
PSN: MagickTofu Playing: Blades of Time (PS3), Mass Effect 3 (PS3), Ayakashi (Android, invite code Magi)
I would say it is ok if you don't want the ones she has to offer, but the ones I focus on are the ones that transmigrate, since they get stronger afterwards and level cap increases. Also, if you see the amount required, the chapter 8 daemons needs 10 chains on the first encounter D: