Unfortunately ghold gets a free plot off on 4/5 of the mons who arent blissey on the team.When Blissey clicks Calm Mind, it becomes difficult to break. For example, a +6 252+ SpA Tera Fighting Gholdengo’s Focus Blast deals 62.5–73.9% (408–482 damage) to a +3 4 HP / 252+ SpD Blissey, guaranteeing a 2HKO. However, Gholdengo only has 8 Focus Blast PP, and it needs to hit every one to break through, while Blissey can spam Soft-Boiled. The chance of hitting 5 Focus Blasts in a row is only about 16%. The only real threat is Psyshock, but Blissey can Tera Dark to handle it.
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%.