Yeah, Ancientpower isn't the best option. Extrasensory is a good choice BB, as I've stated previously. It gives you a non Scarfgar revenge killer, but also works well against DD LO Gyarados. It DD's as you switch to Zapdos, and you're like 'ohai, meet mai T-Bolt' :x
For Heatran, I think the main attraction of HP ICE is revenge killing Garchomp...but it's not on the suspect ladder. Why not run Grass or Electric? I don't like the idea of Stealth Rock on it tbh. I know it's been used by people, but if you outspeed a Gengar lead first up, they will know you've got scarf, and if you SR...well, you switch to your Gengar counter, and they switch to something that counters common Gengar counters. You're on the back foot.
IMO, Fire Blast/Earth Power/HP Grass or Electric/Dragon Pulse
~T_S