Yeah, Ghold can Nasty Plot on the switch, but relying on Tera Fighting and Focus Blast is pretty shaky. Focus Blast hitting twice in a row is only 49%, and even with 4 tries, it’s still not guaranteed. Plus, Tera Fighting isn’t that common on Ghold since Tera Fairy is usually a better option. Blissey can also just spam Soft-Boiled and stall out Focus Blast’s 8 PP, so it’s not as easy as it sounds. Sure, if you land the Focus Blasts and break Bliss, Ghold can clean, but hitting all those is super lucky and far from consistent.Unfortunately ghold gets a free plot off on 4/5 of the mons who arent blissey on the team.
Nasty plot on the switch -> 2 focus blasts. If they both hit, which is about a 50/50 chance, ghold always kills and you win the game. If one of them misses you switch out and try again later. You get 4 chances at this which is a 93.2% chance of winning.
Once blissey is gone. ghold just rolls over everything else.
The only way out I can really see is after bliss dies or you happened to win 50/50 you can bronzong tera fighting psychic noise -> die -> dozo double avalanche. but at that point your team has kinda been blown wide open and assumes all of those mons are at 100%.