Though I've only recently started using Restini, saying rest talk on it isnt viable cause it lacks heal bell is like saying Resttalk Heracross wasnt the largest sweeper in UU for a long time. The difference being while Resttalk Heracross gets a guts boost, Restini gets Marvelscale boost. making it an *even more effective* bulky sweeper. It gets dragon dance to deal with its attack and speed stats making it very hard to revenge (as I'm pretty sure the only viable ice-sharder in the teir is Snover, though im sure a powerful sucker punch can do a chunk too. No calcs, might do them later if this escalates) kill. A set of Rest/Sleep Talk/DD/Outrage w/ eviolite provides you with AMAZING physical defense while under sleep, essentially an immunity to status and a powerful, nearly unresisted STAB to use without fear with sleeptalk (it doesnt lock you in Outrage, iirc). As a late game sweeper it has everything it wants, bar priority, and it even has that in Extreme Speed if you're willing to drop DD for it; though tbh i dont like running moves with common immunities (missy) on a rest talker, as it raises Sleep talk fail chance to 66% which is just too high. I'd have to play with it more but I definitely think its in the A teir with Snover and friends. Honestly, biology has been beating my butt lately and I recently joined a competitive Tribes team so I havent had much time to LC, i wish i could give examples of its use past papermoning.
Also putting a notion for All the resident Ice types, bar snover to D, maybe even E. I think *maybe* smoochum is like *kind of* viable? If you feel otherwise, feel free to say Delver you're an idiot, but I feel the universal consensus is that if its not Snover, and its Ice type, you dont use it.