NU Team Help topped at #52 on PS

I've asked for help quite a few times before, but this is the first time I've asked help for my NU team. It's been my most successful team ladder wise, and has won two NU tournaments. Since I got the 52 ladder rank, it's been going downhill. My team has seemed to lost its edge and I would like some advice on getting that edge back.

Cradily (M) @ Chesto Berry
Trait: Suction Cups
EVs: 252 HP / 4 Atk / 252 SDef
Careful Nature
- Rock Slide
- Seed Bomb
- Curse
- Rest

Cradily is what I would like to call, my pseudo-lead. People expect me to use stealth rocks, but I use curse instead and the sweeping begins. I get as many curses in as possible, then rest away any damage and statuses that I have accumulated. This set has worked very well and has resulted in many sweeps and countless rage-quits. I don't mind the loss of entry hazards since focus sash is extremely rare in NU and my team just never quite seemed to need them.

Weezing (M) @ Black Sludge
Trait: Levitate
EVs: 252 HP / 4 Def / 252 SAtk
Modest Nature
- Clear Smog
- Fire Blast
- Thunderbolt
- Memento

Weezing is my physical wall and sweep counter. He's a valuable part of my team that has stopped many would be sweeps. I use those two special attacks for excellent type coverage and memento is there for the occasional suicide.

Swellow (M) @ Flame Orb
Trait: Guts
EVs: 4 HP / 252 Atk / 252 Spd
Jolly Nature
- Brave Bird
- Facade
- Protect
- U-turn

My newest addition and one of my most valuable. Swellow is a common powerhouse in the tier and it's no wonder that it finds itself onto a team like mine, full of powerful attackers. This is its main sweeping set, and it has done its job many times before, to near perfection. The only thing that can stop it are steel and rock types. Both uncommon in the NU tier.

Gorebyss (F) @ White Herb
Trait: Swift Swim
EVs: 4 HP / 252 SAtk / 252 Spd
Modest Nature
- Shell Smash
- Surf
- Ice Beam
- Hidden Power [Ground]

Gorebyss is my special sweeper. Entry hazards are very common, and since my team doesn't have a rapid spinner, I choose white herb over focus sash so Gorebyss is more likely to stand up to the first attacks. Hidden power ground is there for those pesky steel and electric types, that seem to be a struggle to take down sometimes.

Ampharos (F) @ Air Balloon
Trait: Static
EVs: 252 HP / 252 SAtk / 4 SDef
Modest Nature
- Heal Bell
- Focus Blast
- Thunderbolt
- Hidden Power [Ice]

Ampharos is here for some much needed, electric resistance. Since half of my team is weak to electricity, I juggle Ampharos around to help cover that weakness. It replaced Raichu because I liked the extra bulk. Ampharos also counts as my steel killer because of focus blast.

Drifblim (M) @ Flying Gem
Trait: Unburden
EVs: 252 HP / 4 Atk / 252 Spd
Hasty Nature
- Acrobatics
- Shadow Ball
- Will-O-Wisp
- Destiny Bond

Drifblim is here because I just couldn't find another pokemon here that I liked using. I wouldn't be opposed to switching Drifblim out, but I just don't know who to put up as a replacement. The really nice thing about Drifblim is the unburden ability. Thanks to that ability, I no longer fear Jynx and other psychic types. Another pokemon that checks psychic types, especially Jynx, would be appreciated. Having a resistance to electric attacks would also be nice.

There's my team and I have a few things to say before you get to your (constructive) critique. This team does a very good job of checking weaknesses, and I wouldn't consider electric types to be something to worry about. There are only a couple threats in the shape of Sawk and Jynx. Other than those two, my team does very well. That's all I have to say and I thank you for your time.