I have been using the Torterra lead in both shoddy and WiFi battles and have found it very successful. It always gets stealth rocks up and, most of the time, destroys the other lead.
The only change I made to it was its item. I found that a focus sash is a lot more useful. Not every lead has a fire move, some in fact have ice moves. The focus sash keeps him alive long enough to lay the Rocks down and then switch out for later.
Because of the Focus Sash though, it only makes sense to change the move Wood-Hammer to Seed Bomb. The drop in power isn't significant enough to eliminate Swampert, but you might miss out on other KO's. Overall though, the survivability outweighs the drop in power.