Well, Tyranitar's attack is considerably higher than his special attack, so if I were you I'd focus more on that.Moreover his defense is so high.So maximise the Evs in its attack and defense and you can save some Evs for Hp which is also good.so yeah I think the idea of max-def-att-tyranitar is viable
Here is a good move set
Tyranitar@ Focus Sash
Trait: Sand Stream
EVs: 4 HP / 252 Atk / 252 Def
Adamant Nature (+Atk, -SAtk)
- Earthquake
- Fire Punch
- Stone Edge
- Crunch