Orlando Anacleto Asked: Is my Pokemon black party good?

Tell me what you think about my team. I'm open to any and all suggestions.

Hydreigon – Lv. 76
Attack: 201
Defense: 158
Sp. Atk: 225
Sp. Def: 150
Speed: 199
(Move set: Crunch, Fly, Dragon Pulse, Outrage)

Zebstrika – Lv. 71
Attack: 178
Defense: 112
Sp. Atk: 129
Sp. Def: 114
Speed: 195
(Move set: Flame Charge, Thunder, Wild Charge, Thunderbolt)

Starmie – Lv. 76
Attack: 135
Defense: 146
Sp. Atk: 209
Sp. Def: 149
Speed: 214
(Move set: Surf, Hydro Pump, Psychic, Thunderbolt)

Dragonite – Lv. 75
Attack: 244
Defense: 185
Sp. Atk: 186
Sp. Def: 173
Speed: 150
(Move set: Ice Beam, Dragon Claw, Hyper Beam, Outrage)

Tyranitar – Lv. 75
Attack: 221
Defense: 194
Sp. Atk: 194
Sp. Def: 144
Speed: 140
(Move set: Hyper Beam, Dark Pulse, Ice Beam, Earthquake)

Serperior – Lv. 72
Attack: 147
Defense: 159
Sp. Atk: 136
Sp. Def: 165
Speed: 187
(Move set: Energy Ball, Coil, Giga Drain, Frenzy Plant)

Alexa Asked: Rate My Pokemon Team + Give Me Tips?

I don't use candies to train them, I only do it by battling. I also don't care about natures, sorry! Here is my team:

Haxorus
-Dragon Claw
-Swords Dance
-Earthquake
-Brick Break
Item: Dragon Fang

Lilligant
-Giga Drain
-Quiver Dance
-Toxic
-Energy Ball
Item: Miracle Seed

Eelektross
-Thunderbolt
-Flash Canon
-Dragon Tail
-Flamethrower
Item: Magnet

Samurott
-Surf
-Swords Dance
-Return
-Ice Beam
Item: Mystic Water

Archeops
-Acrobatics
-Rock Slide
-U-turn
-Earthquake
Item: None

Volcarona
-Flamethrower
-Bug Buzz
-Quiver Dance
-Psychic
Item: Charcoal

That's my team that I have played through the game with (except Volcarona, of course). Any tips on moves, items, or even Pokemon choice would be greatly appreciated. Thank you!