Alpine, there is a Mamba Max Pro that is designed specifically for 1S class racing (1/12 scale and pan car). I would not however use it in the Savage Flux as it would die a slow death. (pun intended)
mong, the speed control that would burn easiest on 2 cells would be the one that has a max input voltage of one cell. But since you are an rc guru, you probably already knew that.