Probably one of the more uncommon things I use, I honestly can't believe its uncommon considering how well it works, special Forretress with pain split:
Forretress (M) @ Leftovers
EVs: 248 HP / 204 Def / 56 SAtk
Relaxed Nature (+Def, -Spd)
- Pain Split
- Stealth Rock / Spikes
- Rapid Spin
- Hidden Power [Ice]
I've been using this since like April I think. This Forretress is just amazing, by far the most reliable and sturdy rapid spinner in the tier, and that's all pain split. Pain split means Skarmory and Forretress can not beat it unless they get really lucky or they are burned (in which case both go down). I have litterally PP stalled those buggers to death, so if you see me in battle don't tempt me, will waste one hour of your life if you don't switch.
Hidden power ice makes it so I can beat Landorus and Gliscor, it allow allows you to revenge / kill various dragons locked into outrage. Spikes or stealth rocks depending on what I need. A very effective set, its been a staple on almost all my teams. The evs are all in defense to take outrages and earthquakes better, outside of the 56 special attack evs which guarantee a lot of 2HKOs with HP ice.