Moltres isn't in that league by a longshot. Before we start claiming the conditions under which it can ruin a team, we need to consider the amount of effort those conditions require. Maintaining multiple layers of entry hazards as well as spinning them out requires a lot of support and a lot of effort, which is reason enough to believe that it shouldn't even be considered for BL.
I'm a tad late for most of the Moltres talk, but QFT. This was the basis of my voting paragraph: It's true that it can threaten most of UU with the right support, but you're devoting half a team (spiker, spinner, rocker, spinblocker [or spiker, donphan, and spinblocker {No, Froslass only does one of those tasks}]) to supporting the burning turkey, and a lot of other mons can threaten pretty well if you're that devoted to them.
Another flaw in the moltres + support argument is that spikes/rocks are either common battle conditions, or they aren't. If they are, you can assume that Moltres loses half its health every time it switches in and has effective defenses of 10/90/85 unless it Roosts. If they aren't, then, well, Moltres doesn't threaten everything.
Still a very nice bulky-ish special attacker. And that's it, because, really, even a LO Air Slash can't overpower Chansey.


















