Can anyone help me improve my singles team?

I've only started competitive battling in 6th gen, my team's doing quite well, but I'm always looking for a way to improve it. This is my current team is;

Wobbuffet
Item: Leftovers
Ability: Shadow Tag
EVs: 252 SDef / 24 HP / 232 Def
Bold Nature
- Counter
- Encore
- Mirror Coat
- Safeguard

Gliscor
Item: Toxic Orb
Ability: Poison Heal
EVs: 252 Def / 252 HP / 4 Spd
Impish Nature
- Earthquake
- Toxic
- Protect
- Substitute

Florges
Item: Rocky Helmet
Ability: hoa Veil
EVs: 252 SDef / 252 HP / 4 SAtk
Calm Nature
- Aromatherapy
- Moonblast
- Wish
- Protect

Chandelure
Item: Choice Scarf
Ability: Flame Body
EVs: 252 Spd / 252 SAtk / 4 SDef
Timid Nature
- Flamethrower
- Energy Ball
- Shadow Ball
- Will-O-Wisp

Donphan
Item: Assault Vest
Ability: Sturdy
EVs: 48 Atk / 252 HP / 208 Def
Impish Nature
- Earthquake
- Ice Shard
- Knock Off
- Rapid Spin

Cloyster
Item: King's Rock
Ability: Skill Link
EVs: 252 Spd / 252 Atk / 4 HP
Adamant Nature
- Icicle Spear
- Razor Shell
- Rock Blast
- Shell Smash