I like this subject. Isn't as clearcut as some other theorymonning.
Mold Breaker Life Orb Samurott would be pretty nifty, but I'm wondering, would you guys still use Mold Breaker on the Swords Dance set? Torrent is a very important part of Samurott's sweeping capabilities, as with it, you can tank a hit while setting up, and then potentially get knocked down to bellow 33% which makes the power of your Aqua Jet skyrocket. Mold Breaker, of course, allows Samurott to OHKO Golem, beat Jynx, and hit fast Seismitoad with Aqua Jet, or bulky Seismitoad with a 100% accurate move. Samurott can tank a hit from Jynx, but being able to KO it before it can attack with Aqua Jet is great. It's quite the tossup, but I'd probably go with Torrent in the end.
Torrent is also nice on special attacking Samurott, as those 33% Hydro Pumps are just devasting nukes. I'd be more inclined to use Mold Breaker on this Samurott because it's less dependent on setting up, which makes it less likely for it to be knocked under 33% health, and best case scenario it will die after 3-4 Hydro Pumps anyways. It's still a tossup between Mold Breaker and Torrent, though, as Mold Breaker isn't that great for Samurott.