Really, just slap a Life Orb on him and have him pick off/weaken stuff for your haymaker, Doryuuzu. Of course, it's not going to be that simple to do against anyone decent, especially stall, but that's really the best thing he can do ATM. Sand Throw is just way too good for him to bother with anything else.
Keep in mind, however, that if you DO go Dory/Rando, you're doubling up on a Fighting weakness, and by extension, a Roopushin weakness. I don't think Breloom is something you'd want to see either. Better have an awesome Fighting type counter up your sleeve.
Rando? As in Randorosu? If that's the case then you are actually perfectly fine because Landlos resists fighting and has decent bulk.