Can't use Vish you say? Call me a madman, but let's go over to it's cousin Dracozolt shall we?
Yes, I know this guy isn't viable anymore, however, one thing that caught my eye on this was the lack of an Electric resistance.
Dracozolt @ Groundium Z/Dragonium Z
Ability: Hustle
EVs: 4 HP / 252 Atk / 252 Spe
Adamant Nature
- Bolt Beak
- Substitute
- Earthquake
- Outrage
Dracozolt can switch into Chansey, Substitute to prevent getting statused and proceed to Bolt Beak everything in sight as long as the move's PP isn't stalled out, which shouldn't happen since Bolt Beak at the least 2khos just about everything because nothing on this team outspeeds it. (unless you get really unlucky with Hustle.) Fortunately, Z-moves are a blessing to Zolt, as they never miss and provide a one-time nuke that should help your cause. Avoid getting burned by Scald, Wisp or Heat Wave.