My actual team is this and I want to upgrade it.
Conkeldurr @ Life Orb
Role: Physical Sweeper
Trait: Guts
EVs: 244 Atk / 144 HP / 120 SDef
Adamant Nature (+Atk, -SAtk)
Mach Punch
Drain Punch
Payback
Stone Edge
Hydreigon @ Life Orb
Role: Special Sweeper
Trait: Levitate
EVs: 252 Spd / 4 Def / 252 SAtk
Timid Nature
Draco Meteor
Fire Blast
Focus Blast
U-turn
Ferrothorn @Leftovers
Role: Entry Hazard/Tank
Trait: Iron Barbs
EVs 244 Def/ 144 SDes / 120 Atk
Relaxed Nature
Stealth Rock
Leech Seed
Gyro Ball
Powe Whip
Spiritomb @Leftovers
Role: Wall
Trait: Pressure
EVs 252 SDef / 4 Atk / 252 Def
Careful Natue
Will-Wisp
Sucker Punch
Protect
Pain Split
Rotom @ Flame Orb
Role: Utility Pokémon
Trait: Levitate
EVs 252 Spd / 252 Satk / 4 SDef
Timid Nature
Overheat
Trick
Volt-Switch
Hidden Power (Ice)
Walrein @Leftovers?/Quick Claw?
Role: Phazer
Trait: Thick Fat
EVs 252 HP / 4 SAtk / 252 Def
Calm Nature
Scald
Ice Beam
Roar
Encore
Sorry If it's bad or sad. You are the experts.