Wow, I love it how there's a huge discussion about "ZOMFGG torterra" and then the conversation moves onto other analysises, and no comment is left on my orgasmic Torterra sweeper set :(
it's a great set but I was looking for a tankish set.
I ended up going with:
Torterra@Leftovers
Relaxed evs: 200+hp/spdef rest in def, little bit in atk
~Curse
~Synthesis
~Earthquake
~Stone Edge
This set works pretty well for me, the EVs aren't exact because it's an in-game pokemon - and I really didn't want to waste the time finding or buying rare candies then leveling the thing to 100 to find out the exact IVs and applying EVs so I reach magic numbers...
So I just kinda winged it. I've taken it into the Battle Tower and it works pretty well - I faced a Mamoswine around battle 30~ and managed to curse/synthesis to the point where I took only 30 damage from its Avalanche... which I was pretty surprised by. Granted the Mamoswine probably wasn't Adamant and all that, but this Torterra has IVs that look something like this: