It's been 3 months. Is the rmt really that inactive?
Yes lol
None of the Pokemon on your team are viable. Next time you should use the ZU Viability Rankings to see what's good and what isn't, noob
Falinks
Shed Shell isn't needed, and neither is Leftovers. With Falinks's good coverage, all you need is a Life Orb. However, Falinks isn't viable, Sawk is, thanks to its higher Speed and power.

Sawk @ Choice Scarf
Ability: Sturdy / Mold Breaker
EVs: 252 Atk / 4 Def / 252 Spe
Jolly Nature
- Close Combat
- Earthquake
- Knock Off
- Stone Edge
Drifblim
I guess that's a decent set, but there are many much better Ghosts, like the Rotom I beat you with, Cofagrigus, and Silvally-Ghost. Rotom is stronger and has Electric STAB as well as nice utility moves in Volt Switch and Trick, Cofagrigus has good bulk and multiple sets, and Silvally-Ghost is an excellent sweeper.

Rotom @ Choice Specs
Ability: Levitate
EVs: 4 Def / 252 SpA / 252 Spe
Timid Nature
- Thunderbolt
- Volt Switch
- Shadow Ball
- Trick

Cofagrigus @ Chesto Berry
Ability: Mummy
EVs: 252 HP / 252 Def / 4 SpD
Bold Nature
- Shadow Ball
- Body Press
- Rest
- Iron Defense
Cofagrigus @ Colbur Berry / Chesto Berry
Ability: Mummy
EVs: 252 HP / 252 Def / 4 SpD
Bold Nature
- Will-O-Wisp
- Hex
- Body Press
- Rest

Silvally-Ghost @ Ghost Memory
Ability: RKS System
EVs: 252 Atk / 4 Def / 252 Spe
Jolly Nature
- Swords Dance
- Multi-Attack
- Flame Charge
- X-Scissor
Boltund
Again just use Rotom lmao or use Rotom-Fan
Also why are you running a Naive nature?

Rotom-Fan @ Heavy-Duty Boots
Ability: Levitate
EVs: 252 SpA / 4 SpD / 252 Spe
Timid Nature
- Defog
- Hex / Shadow Ball
- Thunderbolt
- Will-O-Wisp / Nasty Plot
Crustle
There is next to zero reason to use this over Frosmoth and Centiskorch as a Bug type. Frosmoth brings a much better offensive typing and Centiskorch brings immediate power and utility.

Frosmoth @ Heavy-Duty Boots
Ability: Ice Scales
EVs: 252 SpA / 4 SpD / 252 Spe
Timid Nature
- Ice Beam
- Bug Buzz
- Quiver Dance
- Hurricane

Centiskorch @ Heavy-Duty Boots
Ability: Flash Fire
EVs: 252 Atk / 4 Def / 252 Spe
Adamant / Jolly Nature
- Fire Lash
- Power Whip
- Knock Off
- Leech Life
Dugtrio
This set is fringe and bad. Not that Dugtrio is good in the first place. I guess you could use Piloswine, but Piloswine shares the Ice type with Frosmoth. Therefore this slot is pretty customizeable. Kangaskhan is a good wallbreaker, Alolan Persian is a solid pivot, Garbodor or Qwilfish set up Spikes which are important for the last team member, and Basculin is a good breaker. I'm not going to put everything here as you can just check out the Smogon sets.
Eiscue
Since Eiscue's main competition, Frosmoth, is already an option for slot 4, why not use Uxie? If you pair it up with Qwilfish or Garbodor's Spikes its Future Sights become even more dangerous.

Uxie @ Leftovers / Colbur Berry / Heavy-Duty Boots
Ability: Levitate
EVs: 252 HP / 252 Def / 4 SpD
Bold Nature
- Future Sight
- Stealth Rock
- U-turn
- Knock Off