OU Stall Team

Hey everyone, I created this stall team with the purpose to basically set up hazards then have my team keep each other alive throughout the battle.
The team looks like this:

Jellicent @ Leftovers
Trait: Water Absorb
EVs: 252 HP / 252 SDef / 4 SAtk
Calm Nature
- Recover
- Will-O-Wisp
- Water Spout
- Ice Beam
Purpose: Jellicents purpose here is to cripple all physical attackers with will-o-wisp whenever it has the chance and spin block so my hazards can stay out and deal more damage to the opposing team. Also, Jellicent and Ferrothorn cover each other perfectly and can keep each other alive for a very long time. Water Spout is there to dish out a lot of damage, Ice beam for coverage and Recover to make sure Water spout does more damage and to keep it alive.

Ferrothorn @ Leftovers
Trait: Iron Barbs
EVs: 252 HP / 252 Def / 4 Atk
Impish Nature
- Leech Seed
- Power Whip
- Toxic
- Protect
Purpose: Ferrothorn's purpose here not only covers jellicent but its also the physical defensive tank of the team. Also, if its adversary isn't a fighting or a fire type, this Ferrothorn set is a bitch to deal with. With the use of leech seed and toxic ferrothorn gets plenty of health back while you can toxic stall with protect. This set is the definition of stalling.

Landorus-Therian (M) @ Leftovers
Trait: Intimidate
EVs: 200 HP / 200 Def / 100 Atk / 8 SAtk
Lax Nature
- Stealth Rock
- Earthquake
- Hidden Power [Ice]
- U-turn
Purpose: I usually lead with Lando-T, He gets stealth rocks up easy and usually checks the weather starters that I see often. This particular set is suppose to stop most physical threats that can't hurt Lando-T with super effective moves and he also checks Breloom who can be a problem for ferrothorn and can cover tentacruels ground type weakness. Hidden power ice is to check other Lando-T's.

Tentacruel @ Black Sludge
Trait: Rain Dish
EVs: 252 HP / 240 Def / 16 Spd
Bold Nature
- Rapid Spin
- Toxic Spikes
- Ice Beam
- Scald
Purpose: Tentacruel is here to spin out any hazards which can really hurt stall teams. He also sends out toxic spikes and picks up toxic spikes. This is the one pokemon that can be replaced with a better rapid spinner if there is one.

Blissey (F) @ Leftovers
Trait: Natural Cure
EVs: 252 HP / 252 SDef / 4 Def
Careful Nature
- Heal Bell
- Seismic Toss
- Wish
- Protect
Purpose: Blissey is just a SpA sponge for this team. He also runs heal bell to make sure my stall team can last a lot longer while passing of wishes as well. He is a full support blissey.

Skarmory @ Leftovers
Trait: Sturdy
EVs: 252 HP / 232 Def / 24 Spd
Impish Nature
- Spikes
- Roost
- Brave Bird
- Whirlwind
Purpose: Skarmory really helps with phasing out pokemon so I never have to worry about a pokemon setting up on my team. He also sends out spikes and has roost to last longer why he phases the other team repetitively.
P.S This is my first post so I'm not really used to this. Hope you guys enjoy the team! Open to all suggestions.

So far the only pokemon that I've had a problem with is Gengar. Any suggestions?

Kyurem-B under sub can be a problem as everything on your team gives it ease of set up. Also how can Gengar be a problem when you have Blissey?
If you want it to be checked why not try ThunderWave on Blissey. Watch out for sub sets though.

Ok this isn't a half bad stall team, although it needs some major tweaking first.

First off, Blissey needs more defense, currently, it is eaten alive by the weakest physical attacks, like Scizors Pursuit. At the very least I suggest you use a spread of 4 HP / 252 Def / 252 SpD Calm

this is the difference in defense:

Your current spread: 252+ Atk Choice Band Scizor Pursuit vs. 252 HP / 4 Def Blissey: 593-698 (83.05 - 97.75%)
My suggested spread: 252+ Atk Choice Band Scizor Pursuit vs. 4 HP / 252 Def Blissey: 284-335 (43.55 - 51.38%)

Considering the nature of this team, I suggest you run just the standard Utility Counter Jellicent on site, Jellicent is mainly a spin blocker on this and water spout is just ineffective. You can consider, the Special Wall set to, although you have Ferrothorn for offensive Starmies, I guess it could be helpful against opposing Keldeos.

Your Landorus-T set needs major tweaking, I am not even sure what your evs do. Just run 252 HP / 252 Def / 4 Atk honestly, at the very least you could just the online suggested 200 HP / 64 Atk / 244 Def Brave to take hits from Terrakions till well but have an offensive punch, (Brave to not lower special attack). I don't really see the point of Hidden Power Ice on Landorus-T honestly here, as Skarmory walls Landorus-T pretty reliably, I suggest you just run Stone Edge instead. (and with it an Impish or Adamant nature)

I also highly suggest you find a place for Toxic on Blissey, Tentacruel, or Jellicent, as currently you have no way of really attacking Pokemon like Volcarona, Keldeo without praying you get 2 layers of Toxic Spikes up, otherwise they sweep you, it also will help a ton against Latias.

Also, I suggest you run Gyro-Ball on Ferrothorn to check a variety of Dragon-types, namely Kyurem-B.

Your team still has some weaknesses, mainly special: Reuniclus and Nasty-Plot Thundurus pretty much steamroll this team, and at the moment, you have pretty much no way of dealing with Venusaur. I think a big problem with this team is redundancy for the most part, Jellicent and Tentacruel pretty much provide the same defensive syngery, as do Skarm and Ferrothorn.

I think the easiest fix for this team is to simply turn it into a rain stall team with Defensive Politoed, found on site, over Jellicent. Politoed makes Tentacruel much more effective, checks Gengar (and allows Tentacruel t0), and also checks CM-Reuniclus with Perish Song, overall just patching the team up much better. I would consider a specially defensive version of Politoed, to check CM-Reunuiclus better. You may also want to test out a defensive grass type over Ferrothorn, like Amoongus, Celebi, or Roserade, which will help check Thundurus and Keldeo much better for this team.

If you don't turn this into a rain stall team though, you still need a way to deal with Venusaur which really does sweep with team, consider then Flamethrower on Blissey to check it.

Good luck man.