This set was requested by the Quality Control staff, so I've gone ahead and done the deed. The EVs may need tweaking (I just used the Supporting Lead's spread), but that's what the community is for. Also, I would love to hear if there are any other teammates or support moves that I should list, because I'm sure there are more than what I have listed here. Anyway, on to the important stuff.
http://www.smogon.com/dp/pokemon/claydol
[SET]
name: TrickScarf Lead
move 1: Trick
move 2: Stealth Rock
move 3: Rapid Spin
move 4: Earth Power / Explosion
item: Choice Scarf
nature: Bold
evs: 252 HP / 252 Def / 4 SpD
[SET COMMENTS]
<p>Claydol's versatility as a lead allows it to pull off a Trick-oriented set quite effectively. Tricking is only half the fun; deciding how to capitalize on your opponent's misfortune is the second part of this set's strategy.</p>
<p>Stealth Rock is always welcome on any team, but the two remaining moves are more dependent on the rest of your team. The moves listed are obviously the most general, since all teams enjoy Rapid Spin support and Earth Power / Explosion allows Claydol to attack after Tricking away its Choice Scarf. However, many other utility moves can be used in lieu of these moves. Claydol has access to dual screens which can come in handy on offensive teams that employ fragile sweepers and can use Toxic to shorten the life expectancy of enemy walls. No matter how you decide to use Claydol, its reliability as a team supporter cannot be ignored.</p>
[ADDITIONAL COMMENTS]
<p>The given EV spread helps Claydol switch in against strong physical threats, like Aggron, Donphan, and Hitmonchan. However, if Claydol is using Explosion (or any other physical attack) in its moveset, use an Impish nature instead of Bold.</p>
<p>Claydol has troubles with a few other popular leads, including Alakazam, Ambipom, Mesprit (especially Trick variants), and Uxie. Luckily, all of these Pokémon can be countered by one teammate: Choice Band Spiritomb. Spiritomb has no troubles switching in against these threats and Pursuiting them as they try to switch out. Other than these leads, however, Claydol should be able to pull off its strategy without a hitch.</p>
<p>Pokémon locked into one attack make prime setup fodder. Teammates like Venusaur, Rhyperior, or other boosting Pokémon or Substitute users have no problem switching in and setting up. Be wary of switching in blindly, however; many players will switch out their Tricked Pokémon if they feel threatened. Luckily, common leads like Cloyster and Omastar will stay in and continue to lay down entry hazards, lessening the chance of a blind switch.</p>
<p>Choice-locked Pokémon are also prime candidates for Dugtrio, whose Arena Trap makes picking them off simple. The shared Water weakness between Claydol and Dugtrio should not be overlooked, however, and should be covered by the rest of your team.</p>
<p>It should be mentioned that Tricking your opponent's lead may not always be the best way to go about using Claydol; locking walls or boosting sweepers like Chansey and Swords Dance Venusaur into non-attacking moves may be just as important as setting up Stealth Rock or dual screens at the beginning of the match.</p>
http://www.smogon.com/dp/pokemon/claydol
[SET]
name: TrickScarf Lead
move 1: Trick
move 2: Stealth Rock
move 3: Rapid Spin
move 4: Earth Power / Explosion
item: Choice Scarf
nature: Bold
evs: 252 HP / 252 Def / 4 SpD
[SET COMMENTS]
<p>Claydol's versatility as a lead allows it to pull off a Trick-oriented set quite effectively. Tricking is only half the fun; deciding how to capitalize on your opponent's misfortune is the second part of this set's strategy.</p>
<p>Stealth Rock is always welcome on any team, but the two remaining moves are more dependent on the rest of your team. The moves listed are obviously the most general, since all teams enjoy Rapid Spin support and Earth Power / Explosion allows Claydol to attack after Tricking away its Choice Scarf. However, many other utility moves can be used in lieu of these moves. Claydol has access to dual screens which can come in handy on offensive teams that employ fragile sweepers and can use Toxic to shorten the life expectancy of enemy walls. No matter how you decide to use Claydol, its reliability as a team supporter cannot be ignored.</p>
[ADDITIONAL COMMENTS]
<p>The given EV spread helps Claydol switch in against strong physical threats, like Aggron, Donphan, and Hitmonchan. However, if Claydol is using Explosion (or any other physical attack) in its moveset, use an Impish nature instead of Bold.</p>
<p>Claydol has troubles with a few other popular leads, including Alakazam, Ambipom, Mesprit (especially Trick variants), and Uxie. Luckily, all of these Pokémon can be countered by one teammate: Choice Band Spiritomb. Spiritomb has no troubles switching in against these threats and Pursuiting them as they try to switch out. Other than these leads, however, Claydol should be able to pull off its strategy without a hitch.</p>
<p>Pokémon locked into one attack make prime setup fodder. Teammates like Venusaur, Rhyperior, or other boosting Pokémon or Substitute users have no problem switching in and setting up. Be wary of switching in blindly, however; many players will switch out their Tricked Pokémon if they feel threatened. Luckily, common leads like Cloyster and Omastar will stay in and continue to lay down entry hazards, lessening the chance of a blind switch.</p>
<p>Choice-locked Pokémon are also prime candidates for Dugtrio, whose Arena Trap makes picking them off simple. The shared Water weakness between Claydol and Dugtrio should not be overlooked, however, and should be covered by the rest of your team.</p>
<p>It should be mentioned that Tricking your opponent's lead may not always be the best way to go about using Claydol; locking walls or boosting sweepers like Chansey and Swords Dance Venusaur into non-attacking moves may be just as important as setting up Stealth Rock or dual screens at the beginning of the match.</p>
