First post in NU!
Definitely a great mon in a core. I'm in the process of testing a team of mine with a Seismitoad/Sawsbuck/Rapidash core, and it works wonders. Just add Armaldo to the mix for good spin support and voila. However, some may say he preforms better as a sun setter, which can be true if you give it a Heat Rock. That speed and Flare Blitz along with the ability to run a Life Orb effectively with a good Rapid Spinner... Yeah, enough said. It's basically a suicide sweeper- get Armaldo (or a spinner on your own team, of course) to spin, switch to Rapidash (or die), Flare Blitz with Life Orb... Great late-game sweeper with appropriate EVs. On its own without team support, however, I see no hope with it as a lead. An EQ, which rocking leads often carry, is an OHKO if Rapidash doesn't get them first- which I doubt, as they are mainly Rock or, in the case of Torkoal, Fire type. It needs proper support, and is the "cleaning up" part of my core. Choice Band also looks good, but I already have 3 other Choiced mons in the current variation on my team and I prefer the damage over the lack of variation and general predictability. Expert Belt is also good for bluffing a Band.
Basically, he preforms all jobs listed in the poll well except lead, though I prefer him as a core member who's best suited to clean up with an Orb. I realize that most people would shy away from 2 forms of recoil + Fire typing, but, late-game with proper support, he's a true hidden gem in NU, in a similar form to Articuno- the weaknesses makes it really underrated.
<Birkal> subway wanna flash a reffie?
<Birkal> I mean -__-
<Birkal> ref a flashie