I've become rather fond of Ghost-Arceus as a spinblocker, especially Perish Trap Ghostceus that removes spinners from the game permanently.
Here's the set:
Arceus-Ghost @ Spooky Plate
EVs: 252 HP / 120 Def / 136 Spd
Timid Nature (+Spd, -Atk)
- Perish Song
While this Arceus may seem to be a huge burden if it's the last Pokemon, it's very good against not only Spinblockers, but many Physical Attackers, serving as an excellent utility Pokemon even when their Rapid Spinner (if they even have one) is removed.
The EVs are pretty simple: enough speed to outrun max speed neutral Base 120's (like Extremekilling SD Arceus), Max HP, rest in Defense.