Works for me too. I will say that the Terrakion/Tornadus-T core is interesting to say the least. Was there any particular reason that Tornadus-T was chosen over Thundrus-T other than Tornadus' fall from ubers? I will admit that I don't have much experience with the genies.
People smashing Entei, you're not taking into account that 50% burn chance. There is practically nothing (the exceptions being relatively bulky Fire types) that wants to switch into a Sacred Fire and risk a burn, and most of those are covered by one or both of Stone Edge and Bulldoze. And then there's the obvious ExtremeSpeed to also set it apart from stuff like Infernape and Darmanitan. Plus, it can take a hit (and yes, Bug, Fire, and Fairy resistances really are useful).
Homeslice, I like Mamoswine and Raikou as members of a core, however, I'm not clear from your explanation on why they work well together. Could you help me understand a little better?
Psyco Josho, that's a really cool idea and I look forward to seeing suggestions of possible cores we could make with your framework!