I wasn't actually hoping to reveal this set just yet, but seeing as this thread seems like the perfect platform to do so, I may as well...
Tyranitar @ Focus Sash
Trait: Sand Stream
EVs: 120 Atk / 136 SAtk / 252 Spd
Hasty Nature
- Crunch
- Superpower
- Flamethrower
- Ice Beam
This set is a great change of pace from the usual Tyranitar sets. Although it requires a bit of support to work to its full potential, such as Rapid Spin support to keep hazards away, and good prediction to get in safely, when played correctly this set will usually net you 2-3 KOs per match. The reason it works so effectively is because of the surprise value - few people expect Tyranitar to run max Speed, and even fewer expect Tyranitar to run a mixed set in tandem with max Speed.
With Crunch you can bluff a choice item initially, only to KO the opponent with the appropriate move who think you're locked in. Some of Tyranitar's usual checks, e.g. Scizor, Breloom, Landorus-T, Gliscor, Garchomp, Hippowdon, Ferrothorn, Forretress, Skarmory, Tangrowth etc will be swiftly dealt with by Flamethrower/Ice Beam.
Focus Sash is an amazing item on this Tyranitar, as it enables it to get unexpected KOs on things that could formerly beat it. Most notable is Terrakion, whom attempts to revenge kill with Close Combat. Tyranitar's sash activates, and KOs Terrakion in the same turn with Superpower. You no longer have to hope that Gengar's Focus Blast will miss, as you will come out on top 100% of the time with Focus Sash still functional. Dragons trying to break through you will come to an icy end. The list goes on.
This Tyranitar may be lacking in terms of overall power, but its ability to turn the tide of the game in your favour makes it worth using. Obviously it isn't as adept at winning the weather war as the standard, bulkier Tyranitar sets, so I'd recommend you either use it in tandem with Hippowdon, or use it on an offensive team that doesn't really rely on weather but would like some way of checking other weather teams. Specifically, it tends to pair well with certain sweepers that are checked by mons that this Tyranitar lures in - Salamence/Lucario/SD Landorus-T to name a few, though another very notable teammate for this set is OTR Reuniclus, who appreciates Tyranitar removing Scizor from play.