slim, every time I've talked about NPNape, its been under sun. With sun up the things you mentioned can't take a hit from fire blast. I run the 40 attack evs and CC for killing 252 ttar. Without sun, yeah you're right.
Actually, everything I listed can tank a +2 Fire Blast under the Sun after SR, if they use specially defensive sets. None of them ever do, so my point is sorta moot, but j/s.
As for the Rapid Spinners thing, you're right that we seem to be lacking. In OU, we have Starmie and Exca for Offensive Spinners, then Forry and Tenta for Defensive Spinners, and that's about it. No, I'm not counting Hitmontop or Donphan, simply because, well, they work, but they're just not the best imo.
What do you guys think about Cloyster as an Offensive Spinner (assuming White Herb)? It could replace Water-STAB, I guess. Gengar can't handle a +2 Speed Cloyster at all. +2 Rock Blast only 2HKOes Jellicent, so it could still burn you, though. It doesn't look as effective at eliminating spinblockers as Exca is, but it would be less expected and could work. The Water-STAB always seemed superfluous to me anyway.