Rate and Help Improved Mixed Tiers team.

I'm kinda new here and I was wondering if you guys could rate and help me improve my team. I don't use a single tier; I use Pokemon from multiple tiers:

Dusclops (M) @ Eviolite
Trait: Pressure
EVs: 4 HP / 252 Def / 252 SDef
Careful Nature (+SDef, -SAtk)
- Rest
- Sleep Talk
- Will-O-Wisp
- Seismic Toss

Hydreigon (M) @ Choice Scarf
Trait: Levitate
EVs: 4 HP / 252 SAtk / 252 Spd
Modest Nature (+SAtk, -Atk)
- Draco Meteor
- U-turn
- Flamethrower
- Focus Blast

Kingdra (M) @ Leftovers
Trait: Swift Swim
EVs: 4 HP / 252 Atk / 252 Spd
Adamant Nature (+Atk, -SAtk)
- Substitute
- Dragon Dance
- Waterfall
- Outrage

Donphan (M) @ Leftovers
Trait: Sturdy
EVs: 4 HP / 252 Atk / 252 Def
Impish Nature (+Def, -SAtk)
- Rapid Spin
- Stone Edge
- Toxic
- Earthquake

Lucario (M) @ Life Orb
Trait: Inner Focus
EVs: 4 HP / 252 SAtk / 252 Spd
Modest Nature (+SAtk, -Atk)
- Aura Sphere
- Flash Cannon
- Dark Pulse
- Hidden Power [Ice]

Electivire (M) @ Expert Belt
Trait: Motor Drive
EVs: 252 Atk / 252 Spd
Jolly Nature (+Spd, -SAtk)
- Wild Charge
- Ice Punch
- Earthquake
- Cross Chop

I've been having trouble winning with this team, but I know that it's a decent team. I have won with this team quite a few times.

You would need to expand on your descriptions, PM me the changes and this thread will get unlocked. Check out the RMT Archive to see the kind of detail we look for.