Although Tyranitar is seen to be much more Dangerous in the physical side, 95 SpAtk is nothing to scoff at. If you give it full EV's it can pull of an extremely dangerous mixed or even pure special sets. Though it doesn't have any Spatk boosting moves at hand, a 4 attack set is always welcome if you need it to be. Specs can be used for full decimation, but one of the points for special Tyran is extended coverage, Fire blast and ice beam come to mind. And mixed sets can't really use specs anyway. Choice scarf is also viable, out speeding much more than the opponent expects it to be able too. But it still remains pretty slow, plus Tyran is seen to be a tank,not a sweeper. So a scarf makes tanking less practical. Leftovers is the preferred item. Life Orb is Viable but again, takes out some of it's practicality.
So, I will give a very basic moveset to try. Feel free to change it in any way!
Mixed Tyran. (Tyranitar) @ Leftovers
Trait: Sand Stream
EVs: 252 SAtk / 148 HP / 104 Atk
- Fire Blast
- Ice Beam
- Stone Edge
Hope I helped!