Honestly, I could even see Doryuuzu working on a Drought team too. One of the biggest threats to such a team is obviously Stealth Rock, and Dory can Rapid Spin as well as Shadow Claw a variety of ghosts that try to block it. Another major threat is other weather such as Sandstorm or Hail, and Dory does very well in the former while packing Rock Slide for those who might take advantage of the latter.
In Sandstorm, I see Doryuuzu as a very potent rapid spinner. I think it gets swords dance, which makes opposing pokemon question as to go to a ghost or not. The speed after Sand Throw is simply incredible. It also works well with Tyranitar and Urgamoth, since in Sandstorm, Blissey will actually be a fairly consistent 'counter' to Urgamoth that can at least cripple it so it can't sweep. Tyranitar can trap ghosts, and Starmie is also sounding like a viable rapid spinner. I think that Gastrodon/Blissey will be the solid counters to other forms of weather.
Heatran comes into mind when trying to wall Urgamoth, and using a entire move just for HP ground seems...wasteful.
So, we know we can run some offensive moves on Urgamoth and effective items:
-Fire Blast (Low acc and PP is the only problem)
-Bug Buzz
-The Flying attack it learns by level
-HP Grass/Ground
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-Leftovers
-Life Orb
-Petaya Berry
-Lum Berry
- Elemental Gems (may or may not be potent)
I would definitely use Urgamoth if I was using a drought team. I think Scizor might also be a good teammate on a drought team (as ironic as that sounds), because it can scout and eliminate ghosts. It can also be teched into Sandstorm I'd guess.
There is some more stuff I wanted to say, but I don't know how to put it. I understand that everyone is hyping Urgamoth for its fantastic sweeping potential after a Butterfly Dance. I can't disagree, but I am just unsure as of now. I can see the power, but I could also see how Urgamoth can fail. As mentioned before, Moltres would make a fine counter. I think one of the biggest deciding factors, in the end, will be Stealth Rock. I'll wait and see.
(Note: Urgamoth should be able to hit fire types in some way or form, so consider that if you want to use Urgamoth)