3's Team for Battle Subway

Looking for a bit of advice. I have 3 pokemon in training for the Battle Subway. All are EV trained but only about level 30ish each. Not sure what items would be best. Unsure where Leftovers should go.

Ferrorthorn
Iron Barbs
Relaxed Nature
252 HP / 88 Def / 168 SpD
Spikes
Stealth Rock
Gyro Ball
Protect (Maybe, Will need to get the TM again as I've used mine already)

Spikes + Stealth Rock setup. Gyro Ball to do a bit of damage if its still alive after setup. Protect to scout as this is the first pokemon in me party.

Vaporeon
Water Absorb
Bold Nature
248 HP / 252 Def / 8 Spe
Wish
Scald
Roar
Protect

This is where the damage comes. Protect is to make sure I get Wish off. Scald is for damage if needed and the burn effect works well against walls from what I've seen. The main purpose is to roar opponents into dying while stalling with protect/wish.

Volcarona
Timid Nature
4 Def / 252 SpA / 252 Spe
Quiver Dance
Fiery Dance
Bug Buzz
Substitute

Substitute to get started and get a few Quiver Dance's off. Fiery Dance and Bug Buzz for STAB sweeping. Thinking Shell Bell would be the best item to try keep a substitute up while sweeping.

I'm looking for some advice on these and what can improve it. If I came across a rapid spinner I'd use it as an opportunity to switch in Volcarona and get a substitute down before a sweep. Is there any specific pokemon I'll have trouble with? Also if I was to make a team of 6 what 3 others would you suggest and why?

Thanks