With the amount of viable playstyles (Rain/Sun/Sand attached to offense/stall) and maybe Deo-D offense it's kind of hard to overlook anything good but I feel like ScarfTran has been. Sand's more balanced style which is seemingly the best for trying to win weather wars is a great fit for Heatran, not leaving it doused by rain and letting it troll Dugtrio on sun. As long as you can get SR up and spinblock you have the advantage against Sun and handling Rain's threats fairly well puts you at an advantage there too. Blissey-esque walls are only really seen on stall which gives you another great reason to run a spinblocker and Tyranitar. With the ease that it pivots in on Genesect as a bonus I'm really surprised it isn't a popular set. If I'm completely honest I wouldn't use a different sand offense archetype BW2 is lol- one viable outline for rain offense and one for sun.