More Team Help Please!

Hello everyone, Steak here.  I made another new team and wanted advice from the SL Community whether I should use it.  Here it is.


Lead:
Aerodactyl @ Focus Sash
Ability: Rock Head
EVs: 248 HP / 8 Atk / 252 Spe
Hasty Nature
- Stealth Rock
- Taunt
- Earthquake
- Flamethrower


Fire/Water/Grass/Fairy Core:
Talonflame @ Sharp Beak
Ability: Gale Wings
EVs: 252 Atk / 4 SpD / 252 Spe
Jolly Nature
- Brave Bird
- Aerial Ace
- Swords Dance
- Roost

Azumarill @ Choice Band
Ability: Huge Power
EVs: 248 HP / 252 Atk / 8 SpD
Adamant Nature
- Play Rough
- Waterfall
- Knock Off
- Superpower

Serperior @ Miracle Seed
Ability: Contrary
EVs: 252 SpA / 4 SpD / 252 Spe
Timid Nature
- Leaf Storm
- Dragon Pulse
- Taunt
- Giga Drain

Razor (Slurpuff) @ Sitrus Berry
Ability: Unburden
EVs: 4 HP / 252 Atk / 252 Spe
Adamant Nature
- Belly Drum
- Play Rough
- Substitute
- Drain Punch


Reinforcements:
Camerupt-Mega @ Cameruptite
Ability: Sheer Force
EVs: 248 HP / 8 SpA / 252 SpD
Calm Nature
- Flamethrower
- Earth Power
- Toxic
- Stealth Rock


This is my team.  If anyone has any feedback on what I can do better, please leave them below.

Here is my new set for Serperior:

Serperior @ Metronome
Ability: Contrary
EVs: 252 SpA / 4 SpD / 252 Spe
Timid Nature
- Leaf Storm
- Dragon Pulse
- Taunt
- Giga Drain

First of all. Why do you have rock head on Aerodactyl? Unnerve or pressure is much better because you're not running any moves that damage yourself. Then your Aerodactyl is not running any stab moves like stone edge or rockslide. Those moves are pretty strong. Try and maybe switch out Flamethrower or Earthquake for stone edge/rockslide.

Your Talonflame doesn't have any fire type move. While I know that fire type moves don't get priority, a powerfull flareblitz to deal with ave a fles is really usefull. Flareblitz is also stab. I would switch out Aeriel ace for flareblitz, since you already have a flying type move and a second one isn't really usefull. You also don't have anything to get stealth rocks gone. Even though you have roost,it means that the opponent can get a free switch in to a pokémon that can handle your Talonflame. Other than that it is good.

Your Azumarill looks good. I don't see any problems with it.

Your Serperior's moveset looks good, even though I prefer running hp fire/ground. I also prefer running life orb for the extra power because Serperior's special attack isn't the strongest out there and metrenome only powers up your moves when you use them multiple times in a row. Also it ups the power by 20% everytime the move is used back to back. But what if the opponent sends out a dragon type? Then you need to switch moves and your power is reset. Life orb is much more usefull. You get a 30% extra power for the cost of a little hp every turn. Although you lose hp every attack you get more reliable power.

Your Slurpufff looks good. I don't see any problems with it.

Why are you using stealth rock on mega-Camerupt? Aerodactyl already has stealth rock. It is just a wasted moveslot in my opinion. I see why you're using it because rapid spin and defog are pretty common, but what if your opponent isn't running one of these moves? Then it's wasted.

Now looking at the team. It looks hyper offensive except for the out of place specially defensive mega-Camerupt. You don't have a physical defensive pokémon to take physical hits either. So there are 2 ways you can fix this. 1 Make mega-Camerupt offensive and run a hyper offensive team, or 2 Switch a pokémon around for a physical bulky one. Also your team has a heavy rock weakness without something that resists it. So stealth rock would cripple your team heavily.
Other than that it looks good and I hope to see more of your work.