Rate my Gen 6 OU Swampert team

Question

Swampert @ Swampertite
Ability: Torrent
EVs: 252 HP / 252 Atk / 4 SpD
Adamant Nature
- Waterfall
- Earthquake
- Ice Punch
- Stealth Rock

Swampert is my lead due to setting stealth rock, and these moves usually have good coverage, and it pairs well with Crobat as I've found.

Crobat @ Black Sludge
Ability: Infiltrator
EVs: 252 Atk / 4 SpD / 252 Spe
Jolly Nature
- Brave Bird
- Cross Poison
- U-turn
- Defog

Crobat is my physical pivot who also runs defog. I've run Roost before but found Defog to be more useful - let me know your thoughts.

Lucario @ Lum Berry
Ability: Justified
EVs: 252 Atk / 4 SpD / 252 Spe
Jolly Nature
- Cross Chop
- Extreme Speed
- Iron Tail
- Bulk Up

Lucario is my physical attacker with priority.

Heatran @ Leftovers
Ability: Flash Fire
EVs: 252 HP / 136 Def / 4 SpA / 116 SpD
Calm Nature
IVs: 0 Atk
- Magma Storm
- Earth Power
- Taunt
- Toxic

Specially defensive set chosen mostly for the fire coverage and bulk. I can't tell if adding a steel move would be helpful, or if I can use Lucario for this.

Ampharos-Mega @ Ampharosite
Ability: Mold Breaker
EVs: 248 HP / 252 SpA / 8 SpD
Modest Nature
IVs: 0 Atk / 30 SpA
- Volt Switch
- Dragon Pulse
- Hidden Power [Grass]
- Power Gem

My special pivot. I know the moveset is unconventional, but it has coverage missing in my other Pokemon. I used to have Hydreigon in this slot, but it proved to be too many Fighting weaknesses for my team....open to suggestions with this one!

Clefable @ Leftovers
Ability: Magic Guard
EVs: 252 HP / 4 SpA / 252 SpD
Calm Nature
- Moonblast
- Soft-Boiled
- Knock Off
- Encore

Another bulky Pokemon I chose mostly for the coverage. I've had success so far on the defensive side, but if my other Pokemon get KOed and just Clefable is left, then I'm usually trapped. Open to suggestions here too.

Overall strengths I've noticed so far: Having a broad enough variety of moves to be able to switch in strategically and OHKO / 2HKO opponents. Not getting walled (most of the time).

Issues I've had so far: Sticky Web users, lack of healing / passive damage options, lots of my coverage moves relying on certain Pokemon and being out of luck when they get KOed.

My preferences: I like using less common pokemon especially in the UU tier, and using balanced / offensive leaning teams. I'm open to suggestions, but I'd love to preserve Swampert and Crobat especially! (Without changing the entire thing to a rain team, preferably).

Thanks for your feedback! I am super new to competitive pokemon so I appreciate y'all bearing w me as I figure things out.

Comments

1. If you want to use Swampert in a competitively viable team in gen 6 OU, it has to have some way of setting rain to activate Swift Swim. Even if you don't want to make it a full rain team, you should at least give Swampert Rain Dance instead of Stealth Rock so it can set rain for itself. Stealth Rock can be moved to Heatran instead. (Lava Plume/Stealth Rock/Taunt/Toxic is a good moveset for SpDef Heatran).
2. Crobat is not very good in Gen 6 OU as it doenst have the stats to hold up there. It's also a very poor Defog user because it loses one-on-one to most Stealth Rock setters like Landorus-Therian or Heatran.
3. Mega Ampharos also just doesnt hold up in Gen 6 OU due to its slowness and mediocre stats. There are many better choices for bulky special attackers there. It's also not a good idea to have two megas here because one of them will be unable to mega-evolve and thus remain very weak by OU standards.

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Bringing low tiers into OU is fine but only if you can specifically explain why it's better for your team than using a standard threat. Otherwise you just end up making a bad team.
I would say use sample teams until you understand the meta enough to make smarter innovations than Crobat and Bulk Up Lucario

Answer 1

Here's what I came up with after tasting

Mega Swampert:
As Cdijk16 said, you need some rain for Mega Swampert to work, so I gave it Rain Dance instead of Stealth Rock, and I made it fast enough to outspeed pokemon at base 135 speed in rain.

Crobat ---> AV Tornadus-Therian:
Crobat is too frail to work well, so I added Tornadus to give you a stronger and bulkier pivot, aswell as a pokemon that enjoys Swampert's Rain Dance. I know this removes your Defogger, but I'll fix that with a later change.

Lucario:
This set is weird, Cross Chop, Iron Tail and Bulk Up? You should be running Close Combat, Stone Edge/Rock Slide and Swords Dance. These moves will make Lucario actually a threatening sweeper for many teams.

Heatran:
No changes to Heatran, this set is just fine.

Mega Ampharos ---> Scarf Latios
Mega Ampharos with it's low speed and being a 2nd Mega makes it not a good choice, so I changed it for a Scarfed Latios.
Latios will be your new defogger, a great revenge killer, and can shut down non Mega set up pokemon.

Clefable:
I gave it Stealth Rocks over Encore since I found I was never clicking Encore against anything.

Edited team: https://pokepast.es/c67a806edb19ff39