This is what that set can do to Pokemon in Sandstorm (assuming Sand Power is a x1.5 boost, correct me if I'm wrong).
Stone Edge vs. Standard Skarmory: 143 - 168 (42.8 - 50.3%) 88% chance to 2HKO w/ SR
Stone Edge vs. Standard Bronzong: 99 - 116 (29.3 - 34.3%) 4HKO with Leftovers
U-turn vs. Standard Bronzong: 93 - 109 (27.5 - 32.2%) 4HKO
Earthquake vs. max/max Swampert: 277 - 362 (68.6 - 89.6%) Possible OHKO with Spikes
Earthquake vs. max/max Hippowdon: 231 - 272 (55.0 - 64.8%) 2HKO
Earthquake vs. max/max Celebi/Shaymin: 129 - 152 (31.9 - 37.6%) 3HKO w/SR since Sandstorm cancels Leftovers
Here's what it does to Pokemon with +2, Jolly, LO, and max Atk in Sandstorm.
Stone Edge vs. standard Skarmory: 223 - 289 (73.4 - 86.5%) nearly a OHKO with SR
Stone Edge vs. Standard Bronzong: 170 - 338 (50.3 - 59.2%) 70% chance to 2HKO with SR assuming it comes in on the Swords Dance and has Leftovers
Earthquake vs. max/max Swampert: 479 - 564 (100%) OHKO
Earthquake vs. max/max Hippowdon: 399 - 469 (95.0 - 111.7%) 71.4% chance to OHKO
Don't deny the power of a double STAB'd Earthquake coupled with a STAB Stone Edge. I didn't do anything for Explosion since it no longer halves the opponent's Def and you don't really need it. I'll do defensive calcs after I eat.
Edit: Now that I look at it, you don't neccesarily need to run Life Orb. This is how much it will do to Swampert while it's holding a Yache Berry.
369 - 434 (91.3 - 107.4%) 47.7% chance to OHKO
So basically just use Tyranitar to get Sandstorm up and hit your counters for a bit of damage and sweep with ease.
Stone Edge vs. Standard Skarmory: 143 - 168 (42.8 - 50.3%) 88% chance to 2HKO w/ SR
Stone Edge vs. Standard Bronzong: 99 - 116 (29.3 - 34.3%) 4HKO with Leftovers
U-turn vs. Standard Bronzong: 93 - 109 (27.5 - 32.2%) 4HKO
Earthquake vs. max/max Swampert: 277 - 362 (68.6 - 89.6%) Possible OHKO with Spikes
Earthquake vs. max/max Hippowdon: 231 - 272 (55.0 - 64.8%) 2HKO
Earthquake vs. max/max Celebi/Shaymin: 129 - 152 (31.9 - 37.6%) 3HKO w/SR since Sandstorm cancels Leftovers
Here's what it does to Pokemon with +2, Jolly, LO, and max Atk in Sandstorm.
Stone Edge vs. standard Skarmory: 223 - 289 (73.4 - 86.5%) nearly a OHKO with SR
Stone Edge vs. Standard Bronzong: 170 - 338 (50.3 - 59.2%) 70% chance to 2HKO with SR assuming it comes in on the Swords Dance and has Leftovers
Earthquake vs. max/max Swampert: 479 - 564 (100%) OHKO
Earthquake vs. max/max Hippowdon: 399 - 469 (95.0 - 111.7%) 71.4% chance to OHKO
Don't deny the power of a double STAB'd Earthquake coupled with a STAB Stone Edge. I didn't do anything for Explosion since it no longer halves the opponent's Def and you don't really need it. I'll do defensive calcs after I eat.
Edit: Now that I look at it, you don't neccesarily need to run Life Orb. This is how much it will do to Swampert while it's holding a Yache Berry.
369 - 434 (91.3 - 107.4%) 47.7% chance to OHKO
So basically just use Tyranitar to get Sandstorm up and hit your counters for a bit of damage and sweep with ease.