@Lucius Cypher
I've used Wishiwashi before, and while I have the complete new team planned out and Wishiwashi is not on it, I can say that it's still an amazing fish to use. I didn't run a Rest / Sleep Talk set, rather I ran Hydro Pump, Earthquake, and Ice beam on it, and regardless of my really weird spread it still managed to kick ass when I used it. I'd probably cry if it somehow got access to something like Water Spout, as that could be so strong in a good Trick Room set.
The final team is Tsareena, Garchomp, Celesteela, Tapu Koko, Oranguru, and Araquanid by the way. I'm excited to be using Instruct on my Swords Dance Garchomp.
Sounds like a good set up. I should emphasis that you ought to exploit the living shit out of Tsareena's Queenly Majesty and try your best to make her speedy! Without priority moves, even ones like Protect and such, she could even beat the likes of Golisopod to the punch. And while I've never faced one before, I'm almost certain that my Tsareena could outspeed Pheromosa if needed. I certainly hope to test it when I loan my sis my Tsareena.
I've also found, upon recent reexamination, that a lot of my bulky pokemon tends to run the Rest/Sleep Talk combo. I must have some odd fascination for self-healing.