Two of the most important things for this clear.
1. You need to save Volo’s TM for right after Fantina’s field exr sync. This will make it so ex ghost zone takes the remaining duration of that field ghost zone, as well as adds the extension from Volo’s “Deep Shadow” sync grid node. This is the only way for ex zone to last long enough for Volo and Irida to dish out the dmg necessary.
2. You need to not flinch Lugia and Suicune with Fantina’s “astonish” or you’ll most likely end up in a position where you’ll be eating two surfs from Lugia and Suicune before they can be flinched again. The team can’t tank that much damage and the run is over.
You’ll also need to crit everything too unfortunately…