Yeah Huntail is very good at the moment. It can sweep unprepared teams all by itself with ease, but the fact that it can easily just pass its boosts to something like Simisear, Rapidash, Seviper, Fraxure, Raticate, etc. when it can't sweep on its own, makes it that much more intimidating to face. I've been using SS Huntail + LO Seviper recently, and it's an incredible offensive core that just completely obliterates teams if given a chance to set up and pass. Huntail only really needs Waterfall and Ice Beam to be a threat itself, as a +2 Ice Beam easily OHKOs Gourgeist-S as well as Quilldin with just a little bit of residual damage. Anything else that gives it trouble such as Clefairy, Spritzee, Gogoat, and Metang are just destroyed by Seviper anyway.
Also here's a set set/Pokemon that I've yet to see anyone use and I'm actually very surprised considering how strong it is:
Rampardos @ Choice Scarf
Ability: Sheer Force
EVs: 252 Atk / 4 SpA / 252 Spe
Naive Nature
- Head Smash
- Earthquake
- Rock Slide
- Ice Beam
Rampardos has the highest Attack stat of any Pokemon in FU, hell its Attack stat rivals that of many Pokemon found in OU, so down here pretty much everything is going to be 2HKOed if not OHKOed. However, its Speed tier is rather lackluster, even in FU, so a Choice Scarf remedies this very nicely, putting it ahead of most of the offensive metagame (up to Jumpluff). Because it's still outsped by most boosting sweepers, Scarf Rampardos isn't primarily used as a revenge killer, rather it's better off as a cleaner or an early game wallbreaker that can basically start spamming Head Smash turn 1 against offensive teams. Head Smash is so damn powerful that it can even 2HKO Quilladin after SR, which is pretty cool for a physically offensive Pokemon. Head Smash needs to be used sparingly though; because while it is very powerful, it heavily weakens Rampardos, leaving it very susceptible to priority and other Choice Scarf users. Earthquake is its best option for Lairon, Metang, and Klang. Rock Slide is a good back up STAB when you don't want to take the recoil from Head Smash, and it's more accurate too. Ice Beam rounds off the set because it lets Rampardos OHKO offensive Gabite, which it otherwise can't do.