I've tried a simple offensive Heatran with 248 HP EVs instead of all that Speed, I wouldn't recommend it for everyone as max Speed Timid outruns a LOT of stuff, but it's still pretty cool. I like the extra bulk because too often I'm switching Heatran into Draco Meteors, Outrages, Hurricanes, U-turns, et cetera and finding that it dies too quickly. At the same time, I needed the offensive power Heatran provides, so that was a nice compromise. I must say, it worked as a mighty good tank, reliably setting up Stealth Rock, tanking lots of hits, and hitting really hard too. It's become my new norm for when I use Heatran (assuming it's not Magma Storm). Magma Storm Heatran, on the other hand, has fallen from grace in my hands at least. It used to be a great trapper, and it still is, but the pace of the metagame has changed from BW1, and one miss from Magma Storm can mean a lot. This is especially noticeable when I need Heatran to check things that Heatran is supposed to check, and of course I need some offense, which often can only be Magma Storm. Adding to that, I have to either give up a very useful move for Stealth Rock or relegate it to another mon, and sometimes I just can't do that. Heatran's an excellent pick in the current metagame, and even though I personally don't like it, specially defensive sets do great versus a ton of stuff that rip apart a lot of the metagame. Genesect counters are always in demand, and Heatran is the premier one. It can run Rocky Helmet to solidify its potency against Genesect, and Air Balloon for a safeguard albeit a fragile one against Dugtrio, Landorus-T, and Earthquakes from some Dragon-types. Shed Shell is also a stellar item choice to escape Dugtrio. Life Orb and Leftovers are great too for the power and for some much-needed recovery, respectively. With a wide array of moves, including Stealth Rock, Taunt, Toxic, Roar, Fire Blast, HP Ice, Torment, Magma Storm, RestTalk, and last but not least Earth Power in conjunction with these many useful items, Heatran can cater to its teammates' needs and wants. Despite the prevalence of sun, Heatran is still the amazing Pokemon it has always been.