Okay, okay. I see your point about Eruption VS Overheat, and yes, I overlooked the setup factor that Overheat allows after the SpA drop. However, I'm not convinced that Cyndaquil > Charmander simply because I've had more success in using Char than Quil, BOTH of whom I've used enough to tell the difference (...I think). And that includes against Mantyke switchins (I haven't seen anyone use Ponyta), who yes, are 2HKOed by Rock Slide on the switch.
It's like they say, in theory, practice and theory are the same, but in practice, they aren't.
But I think you're probably right about Magby outclassing Scarfmander. So I guess I'll just take him down, then? :\ (Bah... there goes all that testing time.)