[Xing*]

Dugtrio @ Choice Band / Life Orb
Ability: Arena Trap
Nature: Jolly / Adamant
EVs: 192 ATK / 252 Speed / 64 Sp.DEF
- Earthquake
- Stone Edge
- Aerial Ace
- Sucker Punch

Standard Dugtrio IMO. Choice Band to boost its not-so-great 259 Atk to 389, or Life Orb for diversity. Earthquake for STAB, Stone Edge for Flying types, Aerial Ace for Heracross. Sucker Punch to outspeed Pokemon that have used DDance / Agility / Rock Polish.

The EVs given here allow it to survive 1 Ice Beam from a BOLD 252 Sp.ATK Blissey.

Note that Adamant Dugtrio deserves a chance.
Why? Because a lot of the things that can outspeed IT (Azelf, Starmie, Alakazam) are OHKOed by Sucker Punch. Also note that Adamant Choice Band Dugtrio can 2HKO Blissey during a Sandstorm.
Credit to Shadowhawk11 for pointing out the above.

NOTE however, that Life Orb is a better overall option than Choice Band for Dugtrio.
Example: You Send in CBDuggy on TTar for the EQ revenge kill.
After TTar is knocked out, the opponent sends in something that is not affected by Arena Trap OR Earthquake. As you switch out, the opponent sets up.
That ONE set-up can easilly cost you the match.

Dugtrio @ Choice Scarf[lol]
Ability: Arena Trap
Nature: Adamant
EVs: 252 Atk / 132 Speed / 120 HP
- Earthquake
- Stone Edge
- Aerial Ace
- Sucker Punch

CScarf Dugtrio. With 132 Speed EVs on an Adamant nature @ Choice Scarf, it can outspeed Adamant Ninjask even with 0 Speed IV.

This set has VERY Rare usage potential.