Dragalge@Toxic Plate/Draco Plate
Adaptability
Modest 124 HP / 252 SpA / 132 Spd
- Draco Meteor
- Sludge Wave
- Scald/Dragon Tail
- HP Fire/Focus Blast
After much experimentation, this is one of Dragalge's better offensive sets. The problem with Choice Specs is that your STABs have immunities, common ones, in Steels and Fairies. Many good teams have at least two of these and because of Dragalge's speed even if Draco Meteor does dent a Steel pretty hard, you won't get a second shot off. I don't like giving the enemy so many free turns. The other thing is that even with Choice Specs, HP Fire is still a 2HKO on Ferrothorn and Skarmory. No boosting item and HP Fire is always a 2hko on physical Skarmory with SR, even with Leftovers, and you out speed Ferrothorn anyway. As for Focus Blast that's only good for Tyranitar, and you can't OHKO bulky variants with Specs either, so you'd have to hit twice. You're better off just going for a Scald burn.
Meanwhile here with the speed and a Toxic Plate you can outspeed still OHKO Clefable and Azumarill. 50% to still OHKO AV Azumarill with SR on the switch. 67% chance to 2HKO AV Conkeldurr with SR too with Sludge Wave, or guaranteed 2HKO with Draco Plate and Draco Meteor. Hydro Pump is out damaged by Draco Meteor thanks to Adaptability even if it's SE, and the accuracy is worse too, you're better off with Scald. Thunderbolt only offers to 2HKO special defense Skarmory.
The plates are recommended because with Adaptability the added power is compounded and makes some big differences, enough to warrant it over Black Sludge for this particular spread. Because like was said, Dragalge really really is specially bulky and has great resistances with a Toxic immunity. Life Orb unfortunately doesn't help your coverage damage enough to make a difference, and the residual damage is bad on something as slow as Dragalge. It can stick around otherwise.
Dragalge@Black Sludge
Adaptability
Calm 248 HP / 156 SpA / 100 SpD
- Substitute
- Sludge Wave/Draco Meteor
- Scald/Toxic
- Dragon Tail
This set is meant to be paired with Skarmory who lays lots of hazards. The two are an amazing pair defensively, covering all of each others weaknesses with a resistance (outside of Ice) and covering both physical and special bulk. With hazards down and Dragalge out, there is intense pressure on the opponent, particularly if they think you're choiced. It's easy to get a Substitute on the switch then. The spread allows you to OHKO Mega Gardevoir with SR 100% of the time, and Hyper Voice doesn't come close to a OHKO on its own. Substitute and causing Scald burns can actually make you pretty damn tough to take out actually. Mega Manectric, Specs Magnezone, Specs Raikou and Rotom-W Volt Changes can't break your Sub, and Manectric HP Ice is a 4HKO. With a resistance to Bug, many common U-Turn users can't break the Sub either including CB Staraptor, CB Talonflame, CS Jirachi, Landorus-T and Diggersby. With hazards down, Dragon Tail is a good way to rack up hazard damage if there aren't Fairies but lots of Steel and Poison types. Here are some calcs too.
252 SpA Life Orb Gengar Shadow Ball vs. 248 HP / 100+ SpD Dragalge: 121-142 (36.3 - 42.6%) -- 94.7% chance to 3HKO after Black Sludge recovery
252 SpA Life Orb Thundurus Hidden Power Ice vs. 248 HP / 100+ SpD Dragalge: 117-140 (35.1 - 42%) -- 85.9% chance to 3HKO after Black Sludge recovery
252 SpA Mega Charizard Y Fire Blast vs. 248 HP / 100+ SpD Dragalge in Sun: 110-130 (33 - 39%) -- 12.7% chance to 3HKO after Black Sludge recovery
252 SpA Mega Charizard Y Dragon Pulse vs. 248 HP / 100+ SpD Dragalge: 152-180 (45.6 - 54%) -- 3.9% chance to 2HKO after Black Sludge recovery
252 SpA Choice Specs Keldeo Secret Sword vs. 248 HP / 0 Def Dragalge: 113-133 (33.9 - 39.9%) -- 35.2% chance to 3HKO after Black Sludge recovery
252 SpA Choice Specs Keldeo Icy Wind vs. 248 HP / 100+ SpD Dragalge: 126-150 (37.8 - 45%) -- guaranteed 3HKO after Black Sludge recovery
0 SpA Heatran Earth Power vs. 248 HP / 100+ SpD Dragalge: 114-136 (34.2 - 40.8%) -- 54.1% chance to 3HKO after Black Sludge recovery
252+ Atk Mega Heracross Pin Missile (5 hits) vs. 248 HP / 0 Def Dragalge: 165-195 (49.5 - 58.5%) -- approx. 58.2% chance to 2HKO after Black Sludge recovery (Sludge Wave 2HKO if on switch,needs Earthquake to OHKO)
+2 44+ Atk Technician Mega Scizor Bullet Punch vs. 248 HP / 0 Def Dragalge: 228-268 (68.4 - 80.4%) -- guaranteed 2HKO after Black Sludge recovery (Scald is great here and Dragon Tail)
252+ SpA Choice Specs Magnezone Flash Cannon vs. 248 HP / 100+ SpD Dragalge: 151-178 (45.3 - 53.4%) -- 1.2% chance to 2HKO after Black Sludge recovery
+2 252+ Atk Technician Breloom Rock Tomb vs. 248 HP / 0 Def Dragalge: 235-277 (70.5 - 83.1%) -- guaranteed 2HKO after Black Sludge recovery
252 SpA Choice Specs Raikou Hidden Power Ice vs. 248 HP / 100+ SpD Dragalge: 126-150 (37.8 - 45%) -- guaranteed 3HKO after Black Sludge recovery
You get the point. It's a good combination of bulk and power that excels against a variety of playstyles. At first I tried to really abuse Toxic Spikes but they are so useless when you considered the amount of aerial, Steel and Poison types there are on a common team, usually at least 2/3 of a team is immune. Regular Toxic is just plain better if you don't want to use Scald.