Can I have the EV spread for Sandslash lead?
I'm definitely going to try a team with the 'Big Three' Fire-types. It would need offensive momentum and a lot of skilful double-switching, since it probably wouldn't have room for Rapid Spin, but having walls that can do that (Gligar) might help.
Having a triple threat fire team sounds appealing, though I would personally drop Charizard in favor of mixed Rapidash for the ability to kill Slowking with Megahorn and as a scout for Typhlosion and Magmortar. See what the opponent's main answer to fire types are and act accordingly. The analysis set lists Hypnosis in the last slot, but I ran WoW since it most of the time lured out some sort of physically-based Pokemon. Protect or Toxic (I do hate Stall teams that much, ok) are also a good bets. Make sure you have something to deal with common Cursers, and you're good to go.
The biggest problem I see regarding a core of Typlohsion, Magmortar, Charizard, and Rapidash is that Fire Blast is innaccurate. One miss against your opponent's Fire-type counter could cost you the game.
I've tried NP Raichu before, not quite as good as I'd hoped. 100 Base Speed kinda sucks in this tier...I mean yeah you're fast but you hit several notable speed ties, and there's still lots of stuff that outspeeds you, plus Scarfers....Raichu is just so frail, and he has no useful resists so getting outsped means he's dead. So really he can't completely sweep most teams, except of course for stall who he at least gives a lot of trouble.
I never tried it, but I bet Specs Raichu could be pretty fearsome, getting good coverage with T-Bolt/Grass Knot/Focus Blast/HP Ice. Of course, then you have to wonder if he's better just an inferior Manectric, who has that very important(or at least to me) extra 5 base Speed...Manectric's coverage is only slightly worse than Raichu's, and he gets Switcheroo to make up for it so....
No one said that they'd run all four...
I use Rapidash in OU and I give it Double Kick so it can fight Heatran and the few Aggrons that make an appearance in OU.