>>31980118Excellent question.
Duggy removes Chansey, Heatran, Tyranitar, revenge kills Charizard X, M-Gyarados, Hoopa-U and some M-Metagrosses as well as trapping Magnezones who think have power over my Ferrothorn (I do wish I could run lefties on it though, but I cannot risk it at all) and non scarf Leles that meme on either TTar or Ferrothorn.
Fini basically keeps rocks away as well as status so Volc can set up and I can switch stuff like Duggy more safely. On top of that it halves the hp of pretty much anything that switches in (Which in turn makes it extremely vulnerable to Volcarona since after one boost Inferno Overdrive does 75% maximum to anything that resists it unless it's fully spdef Zygarde or something like that. Fini also deals with BB Greninja, bulky grounds and Dragons in general.
Sableye keeps rocks out, weakens physical attackers with WoW (Volc is weak to physical attacks mostly) and removes sashes/thick clubs/scarves.
TTar removes Latis, ZardY, Volcarona, Sheddy, A-Marowak, Zapdos, revenge kills some weakened Metagrosses, Gengar, Choiced Leles, and makes mons go below that magical 75% I mentioned earlier.
Ferro keeps Koko, Mimikyu and Fini away and also passively damages physical water attackers like Gyarados and Azumarill (Who are very good vs Volcarona), has a pretty decent matchup against Metagross too and lures HP Fires so Volc can get a free switch.
TL;DR in most cases if I can get them to below 75% through passive damage I can beat them with Volc, if I can't then I can use Fini or Duggy to get them even lower than that, the only weaknesses this team has are very well played CharYs, Protean Greninjas, a well played Toxapex and the lack of answers to opposing set up in general besides revenge killing.