Slowbro (M) @ Assault Vest
Ability: Regenerator
EVs: 4 SAtk / 24 HP / 252 SDef / 228 Def
Bold Nature
IVs: 30 Atk
- Focus Blast
- Ice Beam
- Scald
- Psyshock

Magnezone @ Choice Scarf
Ability: Magnet Pull
Shiny: Yes
EVs: 252 Spd / 252 SAtk / 4 HP
Timid Nature
- Flash Cannon
- Thunderbolt
- Volt Switch
- Hidden Power [Fire]

Donphan (M) @ Leftovers
Ability: Sturdy
EVs: 252 Atk / 252 HP / 4 Def
Adamant Nature
IVs: 30 SAtk
- Rapid Spin
- Ice Shard
- Earthquake
- Stealth Rock

Chesnaught (M) @ Leftovers
Ability: Bulletproof
EVs: 252 Def / 252 HP / 4 Atk
Impish Nature
- Spiky Shield
- Leech Seed
- Seed Bomb
- Spikes

Bisharp @ Life Orb
Ability: Defiant
EVs: 252 Atk / 252 HP / 4 Def
Adamant Nature
- Swords Dance
- Sucker Punch
- Iron Head
- Knock Off

Gengar (M) @ Black Sludge
Ability: Levitate
Shiny: Yes
EVs: 252 Spd / 252 SAtk / 4 HP
Timid Nature
- Shadow Ball
- Sludge Bomb
- Substitute
- Disable

I've been hovering around the 1550 rating on the ladder lately with the peak coming on around 1650 ish, how do I stick in the higher part of the ladder?