Heatproof Bronzong is a gimmick, tbh... it makes for a poor lead and as a lead is its best spot, since coming in on Spikes gives away the gambit, as well as being hit by a Fire-type attack. While it's usable, it's not exactly very good, and Levitate is always preferable. :x It's reliable and works well. CFJ, that's an interesting thought, though it'd be a shame to give up the EQ potential, but if your team doesn't call for it..