Hello everyone!
I am quite new to competitive Pokemon, but put in some grind on the OU ladder. I was mostly using teams build by other players, but I really wanted to build something on my own and came up with this
bulky offense team built around dancing Volcarona and Dragonite. I am not sure if I am right at this thread, but I don't really know where to go. I just want someone to take a look and tell me, if I am missing something or if the team looks solid enough to reach new heights on the ladder. My success with this team is quite ok, but people on low ladder always struggle against setup. Anyway, lets dive into it!
THE CORE:
Volcarona @ Heavy-Duty Boots
Ability: Flame Body
EVs: 248 HP / 132 Def / 16 SpA / 112 Spe
Calm Nature
IVs: 0 Atk
- Flamethrower
- Psychic
- Roost
- Quiver Dance
EVs outspeed up to

at +1 and OHKO

with Flamethrower at +0. Rest is dumped into HP and Def while having a Calm Nature to maximize the SpD boost of Quiver Dance. Moves are pretty standard, going for roost to keep

healthy to abuse the incredible bulk after some Quiver Dances.
Dragonite @ Heavy-Duty Boots
Ability: Multiscale
EVs: 248 HP / 112 Atk / 40 Def / 108 Spe
Adamant Nature
- Dual Wingbeat
- Earthquake
- Roost
- Dragon Dance
The EVs OHKO a full HP invested

with Dual Wingbeat while outspeeding everything up to

at +1. Rest is dumped into HP and Def to maximize bulk with Multiscale. Thanks to Multiscale you can almost guarantee a turn to setup when you bring it in safely. As said above I think it's not optimal to build a bulky set without recovery, so I'm going for Roost over additional coverage. Checks

with EQ.
SPEED CONTROL AND REVENGE KILLERS:
Tapu Fini @ Choice Scarf
Ability: Misty Surge
EVs: 252 SpA / 4 SpD / 252 Spe
Timid Nature
IVs: 0 Atk
- Moonblast
- Surf
- Ice Beam
- Trick
Misty Terrain protects

and

from toxic. Moonblast OHKOs

which is still faster than both our setups sweepers at +1. Trick helps to break stall teams. EVs standard, Ice Beam to threaten the ever present

.
Gengar @ Focus Sash
Ability: Cursed Body
EVs: 252 SpA / 4 SpD / 252 Spe
Timid Nature
IVs: 0 Atk
- Shadow Ball
- Sludge Wave
- Focus Blast
- Nasty Plot
This boi comes in to revenge kill mainly

,

and

as long as the sash is up. Since this needs hazards to be removed, I added NP and Focus Blast to give

another option to be useful in case I don't manage to Defog or there is nothing to revenge kill.
DEFENSIVE BACKBONE & HAZARD CONTROL:
Heatran @ Leftovers
Ability: Flash Fire
EVs: 248 HP / 128 SpD / 132 Spe
Calm Nature
IVs: 0 Atk
- Magma Storm
- Earth Power
- Stealth Rock
- Taunt
Pretty standard set. Rips holes into teams, breaks

and eats fairy and ice moves thrown at

. EVs outspeed the standard 252 HP / 128 SpD / 128 Spe

set. Sets rocks.
Landorus-Therian (M) @ Leftovers
Ability: Intimidate
EVs: 248 HP / 252 Def / 8 SpD
Impish Nature
- Earthquake
- U-turn
- Knock Off
- Defog
Not much to say here. Role compression.
All in all the team is fun to use and I think it covers many common threats, but I really appreciate any type of advice. Feel free to ask questions!
Thanks in advance and best wishes!