Level 46 Zebstrika with Discharge, Wild Charge, Stomp, and Thunderbolt
Personally, I'd get rid of Heat Crash - it's just too undependable and the times that it hits hard are rarely times that you need it to. The most dangerous opponents often tend to be the heaviest, and those are the ones it hits the weakest. I sort of like Flame Charge with Hammer Arm, since the Flare Blitz speed boost buys back the Hammer Arm speed loss, but that's sort of gimmicky and only works when you're against something that can actually be hurt by both, and the power of Flame Charge leaves quite a lot to be desired. IMO, the best Fire move on Emboar (until you can get Flare Blitz) is probably Flamethrower, even with Emboar's generally lower Special Attack, just because it's powerful and it has no consequences. And if you get Emboar's Special Attack up to the point that it can do pretty good with Flamethrower, then Scald is a natural for the last slot.