Rate my UU team

Question

This is my UU singles team. Let me know if there are any ways I can improve this team

Blastoise @Blastoisinite
Mega Launcher
EVs: 252 SpA/ 200 HP/ 56 Spe
Modest Nature
- Scald
- Ice Beam
- Dark Pulse
- Aura Sphere

Darmanitan @Choice Scarf
Sheer Force
EVs: 252 Atk/ 252 Spe/ 4 HP
jolly Nature
- Flare Blitz
- U-turn
- Rock Slide
- Earthquake

Forretress @Leftovers
Sturdy
EVs: 252 Def/ 252 HP/ 4 SpD
Relaxed Nature
- Stealth Rocks
- Rapid Spin
- Gyro Ball
- Volt Switch

Goodra @Assault Vest
Sap Sipper
EVs: 252 SpA/ 236 HP/ 20 Spe
Modest Nature
- Flamethrower
- Thunderbolt
- Draco Meteor
- Sludge Wave

Flygon @Life Orb
Levitate
EVs: 252 Spe/ 252 Atk/ 4 HP
Jolly Nature
- Earthquake
- Rock Slide
- Crunch
- Dragon Claw

Conkeldurr @Assault Vest
Guts
EVs: 252 Atk/ 252 SpD/ 4 Def
Adament Nature
- Mach Punch
- Drain Punch
- Thunder Punch
- Knock Off

Answer 1

Volt switch on Forretress is a bad choice. Toxic spikes or normal spikes would be better.
That much speed on Darmanitan is unnecessary with scarf. Just do Adamant Nature and a bit bulkier evs.
The Blastoise is good. Wouldn't change it.
Sludge bomb instead of wave on Goodra. The extra 5 BP isn't worth missing out on 20% more poison chance.
This is more of preference, but Dragon Tail instead of Claw could help against setup sweepers.
And.... I wouldn't change the Conkeldurr.

Just some ideas. :)