I really like Kingler and it's really nostalgic from Silver.
First, I find that your team is trying to find its identity play-wise, because some Pokemon slow you down too much, and some need some support to do so. The gameplan for you team is to sweep with Kingler and each Pokemon should assist in that.
Misdreavus is too slow and isn't as powerful as she should be, and doesn't really add anything unique other than spinblocking and some utility that can served by others. Also, it doesn't contribute to Kingler's sweep in any way, so that needs to be fixed. I suggest BlackGlasses Spiritomb
to replace Misdreavus, and it adds some much need offensive presence, and can beat common rapid spinners like Kabutops and Cryogonal. Also, with BlackGlasses Spiritomb can cripple physical attackers with Will-O-Wisp, and add welcomed priority to the team.
Spiritomb @ BlackGlasses
Admant | Infiltrator
EVs: 248 HP / 252 Atk / 8 SpD
- Sucker Punch
- Shadow Sneak
Second, I find Druddigon to be of little use to your team, because most of the time it's sleeping and not utilizing that great base Attack; however, I think its spot could be better used by another offensive Water-type that can overload your opponent. I suggest Swords Dance Kabutops
. Kabutops is deadly after a Swords Dance boost and can easily bludgeon physical walls early- to mid-game after Accelgor. Waterfall and Stone Edge are standard STABs, and Superpower KOes Ferroseed, which would otherwise wall Kingler. A boosted Stone Edge easily 2KOs Tangrowth and has the chance to OHKO after Stealth Rock and full Spikes. Adamant is chosen because Weak Armor boosts Kabutops's Speed and with the boost, the power is welcomed!
Kabutops @ Life Orb
Adamant | Weak Armor
EVs: 4 HP / 252 Atk / 252 Spe
- Swords Dance
- Stone Edge
Next, Uxie right now is a great supporter, but I think it can give you more support. Yawn + U-turn I like a lot, but dual screen support lets Kabutops, and most importantly, Kingler set up easier. Also, a different EV spread can be used to make sure your sweepers aren't harmed with Uxie U-turns.
Uxie @ Light Clay
Bold | Levitate
EVs: 252 HP / 252 Def / 4 SpD
- Light Screen
- Stealth Rock
Lastly, I highly suggest Kingler use Hyper Cutter because if you do face a Qwilfish it's better to at least dent it, rather than do nothing. Also, I suggest Return over Brick Break to hit Qwilfish neutrally. Or if you don't wanna change it, use Superpower because it's way stronger.
Hope I helped n.n