I need Team Help

[Tri-Force X]

OK this is my team I need an item for Lucario and I'm taking out Gardevoir. What should I replace it with?

Charizard @ Leftovers
Modest Nature (+SA, -ATK)
252 SA, 252 Speed, 4 HP
Trait: Blaze

Air Slash
Dragon Pulse/Sunny Day
Flamethrower/Heat Wave
Protect/SolarBeam

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Gardevoir @ Wise Specs
Modest Nature (+SA, -ATK)
252 SA, 252 Speed, 4 HP
Trait: Synchronize

Psychic
Calm Mind
Focus Blast
Energy Ball/Thunderbolt

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Lucario @ ????
Adamant Nature (ATK+, SA-)
252 Attack, 252 Speed, 4 HP
Trait: Steadfast

Close Combat
Earthquake
Metal Claw/Bullet Punch
Shadow Claw

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Salamence @ Choice Band
Adamant Nature (ATK+, SA-)
252 Attack, 252 Speed, 4 HP
Trait: Intimidate

Dragon Claw
Earthquake
Stone Edge
Aerial Ace

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Blissey @ Leftovers
Bold Nature (DEF+, ATK-)
252 HP, 252 Defense, 4 SD
Trait: Natural Cure

Seismic Toss
Softboiled
Thunder Wave
Ice Beam

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Steelix @ Leftovers
Impish Nature (DEF+, SA-)
252 HP, 4 ATK, 252 DEF
Trait: Rock Head

Stone Edge
Double Edge
Earthquake
Iron Tail

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