[Doom Dawg]

Heatran with Solarbeam, I find that awkward... You could use an Air Balloon on Heatran. Then you can take other Heatrans down with more ease. I suggest this set for a Specially Offensive Tran

Heatran @ Air Balloon
Trait: Flash Fire
EVs: 4 HP / 252 SpA / 252 Spe
Timid Nature (+ Spe, -Atk)
- Substitute
- Fire Blast
- Earth Power
- Hidden Power Ice

With this set you can so easily Late Game Sweep, or at least cause havoc in any team. That does not have Gyarados. The deal is... call in Heatran. Force a switch, use substitute. Use whatever you want to KILL. Other really nice use for this is obviously Dragon Slaying. Foes locked into outrage and stuff of the kind. HP Ice OHKO's every dragon 4x weak to it (that is not a Dragonite with Intact Multiscale). It OHKO's all Dragons in OU after SR damage, except Kingdra. Earth power is only to deal with opposing Heatran and other things that are 4x weak to it.

I don't get how you are stalling with Ninetales, except for maybe PP stalling. I run Ninetales in almost every sun team of mine with Overheat and Power Swap, combined with Sunny Day. Is basically a way to destroy Baton Passing chains, destroy Special sweepers. Reset the Dragon Dancing party. Ruins the day of that incoming scald with sunny day. Oh well it is so GOOD but so underrated. The fourth move slot can either be Substitute or Will-O-Wisp. Both are effective, but Will-O-Wisp works great in combination with OH and power swap.
While overheat and power swap take care of the Special threats, willo cripples the Physical ones.

Ninetales @ Leftovers/Air Balloon
Trait: Drought
EVs: 252 SpA / 4 SpD / 252 Spe
Timid Nature (+Spe, -Atk)
- Overheat
- Power Swap
- Sunny Day
- Will-O-Wisp / Substitute