My Own comments, which would NOT be included if this became "concised":
Machamp usage is increasing in the lead spot, which hurts Azelf. Why? Because the user must decide whether to attack or set up rocks. If Standard Lead Azelf is to use Psychic, (which is most likely the strongest attack besides Explosion) he will not kill the standard Machamp, and is then taken out by Bullet Punch on the next turn. In this instance, no Stealth Rocks are set up. If Standard Lead Azelf is to use Stealth Rocks first turn, it is taken out by the combination of Payback and Bullet Punch. The next teammate in line then must deal with a full HP Machamp, as well as the risk of confusion. This set attempts to rectify this problem, whilst also allowing it to beat its biggest threat: ScarfTar.
This lead works to counter increasing trends in the OU Metagame while still maintaining the efficiency of the Azelf lead. It's high speed and reasonable bulk allow it to set up Stealth Rocks and continue to provide support mid-game.
[SET]
name: Colbur Lead
move 1: Taunt
move 2: U-Turn
move 3: Stealth Rock
move 4: Explosion
item: Colbur Berry
nature: Jolly
evs: 252 HP / 4 Atk / 252 Speed
[SET COMMENTS]
The concensus among battlers is that Stealth Rocks is a must-have. With that being said, many players attempt to set up Stealth Rocks immediately while some attempt to thwart any chance of set up with Anti-Leads. This set manages to break the standard Anti-leads, succeed in setting up one's own Stealth Rocks, and continue to be used throughout the rest of the battle, whether as useful fodder, preventing set up (Taunt), or eliminating a problematic poke (Explosion).
<p>The selling point of this set is the Colbur Berry, which reduces the damage of Dark Type attacks by 50%. The standard Anti-Lead Machamp does 42.4% - 50% with the first payback, and even the most offensive Machamp's deal 44.9% - 53.1%. This allows Azelf to set up Stealth Rocks while still being in good health. After setting up the hazard, Explosion is usually the best option. The maximum HP investment is responsible for the following calculations:
Lead Heatran Fire Blast 74% - 87.6%
Lead Roserade Leaf Storm 84.2% - 99.4%
Scarf Tyranitar Crunch 50.3% - 59.6%
Anti-Lead Dragonite Extreme Speed 43.8% - 51.7%
Percentage wise, this generally fails to 2hKo. Although the Draco Meteor will always OhKo, most opponents opt to Extreme Speed first turn to guarentee that the sash is broken.
Lead Infernape Fire Blast 63.6% - 74.9%
Lead Infernape Fake Out 12.1% - 14.4%
Lead Infernape Overheat 74% - 87.6%
Fake Out + Fire Blast is never a 2hKo, while the odd Fake Out + Overheat fails to OhKo on average and needs nearly maximum damage from both attacks.
Lead Metagross Meteor Mash 68.9% - 81.4%
Lead Metagross BulletPunch 28% - 33.1%
Obviously, Lead Metagross can pose a problem. However, the Bullet Punch second turn is almost mandatory for the other player, so you can predict accordingly. Meteor Mash will never OhKo.
With the Colbur Berry, Azelf maintains its momentum, sets up its Stealth Rock at the cost of sheer power. However, the metagame has adapted to the Azelf Lead since it sat at the #1 spot for a while. The Colbur Berry sacrifices Azelf's Focus Sash for a more useful item in today's metagame.
Machamp usage is increasing in the lead spot, which hurts Azelf. Why? Because the user must decide whether to attack or set up rocks. If Standard Lead Azelf is to use Psychic, (which is most likely the strongest attack besides Explosion) he will not kill the standard Machamp, and is then taken out by Bullet Punch on the next turn. In this instance, no Stealth Rocks are set up. If Standard Lead Azelf is to use Stealth Rocks first turn, it is taken out by the combination of Payback and Bullet Punch. The next teammate in line then must deal with a full HP Machamp, as well as the risk of confusion. This set attempts to rectify this problem, whilst also allowing it to beat its biggest threat: ScarfTar.
This lead works to counter increasing trends in the OU Metagame while still maintaining the efficiency of the Azelf lead. It's high speed and reasonable bulk allow it to set up Stealth Rocks and continue to provide support mid-game.

[SET]
name: Colbur Lead
move 1: Taunt
move 2: U-Turn
move 3: Stealth Rock
move 4: Explosion
item: Colbur Berry
nature: Jolly
evs: 252 HP / 4 Atk / 252 Speed
[SET COMMENTS]
The concensus among battlers is that Stealth Rocks is a must-have. With that being said, many players attempt to set up Stealth Rocks immediately while some attempt to thwart any chance of set up with Anti-Leads. This set manages to break the standard Anti-leads, succeed in setting up one's own Stealth Rocks, and continue to be used throughout the rest of the battle, whether as useful fodder, preventing set up (Taunt), or eliminating a problematic poke (Explosion).
<p>The selling point of this set is the Colbur Berry, which reduces the damage of Dark Type attacks by 50%. The standard Anti-Lead Machamp does 42.4% - 50% with the first payback, and even the most offensive Machamp's deal 44.9% - 53.1%. This allows Azelf to set up Stealth Rocks while still being in good health. After setting up the hazard, Explosion is usually the best option. The maximum HP investment is responsible for the following calculations:
Lead Heatran Fire Blast 74% - 87.6%
Lead Roserade Leaf Storm 84.2% - 99.4%
Scarf Tyranitar Crunch 50.3% - 59.6%
Anti-Lead Dragonite Extreme Speed 43.8% - 51.7%
Percentage wise, this generally fails to 2hKo. Although the Draco Meteor will always OhKo, most opponents opt to Extreme Speed first turn to guarentee that the sash is broken.
Lead Infernape Fire Blast 63.6% - 74.9%
Lead Infernape Fake Out 12.1% - 14.4%
Lead Infernape Overheat 74% - 87.6%
Fake Out + Fire Blast is never a 2hKo, while the odd Fake Out + Overheat fails to OhKo on average and needs nearly maximum damage from both attacks.
Lead Metagross Meteor Mash 68.9% - 81.4%
Lead Metagross BulletPunch 28% - 33.1%
Obviously, Lead Metagross can pose a problem. However, the Bullet Punch second turn is almost mandatory for the other player, so you can predict accordingly. Meteor Mash will never OhKo.
With the Colbur Berry, Azelf maintains its momentum, sets up its Stealth Rock at the cost of sheer power. However, the metagame has adapted to the Azelf Lead since it sat at the #1 spot for a while. The Colbur Berry sacrifices Azelf's Focus Sash for a more useful item in today's metagame.