Regarding to the team it's easy to see that's really focused on Primeape's sweep as there is a lot of way to lure flying type, Skuntant to trap psychic and ghost type, and Barbaracle for faster threat such as Swellow, Archeops, Tauros or Floatzel. But I feel like it lacks of something, the first things that immediatly come in mind was the ground immunity because of Gourgeist's lack of synthesis, but while regarding more closely to the team, i've seen that Abomasnow is a huge threat. There isn't any real switch in to Blizzard, because Barbaracle is fearing too much the Giga Drain to come in. So, regarding to the NU list and the PU list, i've found something that can help a lot with these two weakness. Even if it's not that common, i feel like it fit pretty well in this team.
Rotom-Frost @ Life Orb
Ability: Levitate
EVs: 4 Def / 252 SpA / 252 Spe
Timid Nature
- Substitute
- Pain Split
- Thunderbolt
- Blizzard
You'll probably ask me if i'm drunk, but i definitely think that sub split Rotom-Frost is a pretty cool choice for this team as it covers the Ice and Ground weakness, while with the access at a pretty solid Ice STAB, Rotom-Frost help a lot the team by wearing down Vileplume who looks pretty annoying for a team based on Primeape+Scarf Barbaracle. In addition, Thunderbolt is pretty helpful to deal with these water type such as Floatzel (if you are already behind a sub obviously), or Samurott because in my opinion, only Gourgeist to get past of them safely looks like not sufficient. Also, the point I want to talk with Sub Split, is that can be helpful in a lot of situation, like if you are against an Audino-mega, forcing him to rest or wish to send Skuntank or Primeape depending on the situation more safely looks a pretty cool emergency button and that also help to wear down Lanturn more easily than any others set of Rotom-Frost for freeing Barbaracle from risking to miss a Stone Edge.