I am not really the best at team building myself, but I will see what I can do here.
You might want to try giving it Wish in place of Softboiled or Heal Pulse. Seismic Toss might not be a bad option for an attack on this set.
Give it Technician, and use Bug Bite, Bullet Punch, and U-Turn. If the opponent has any fire move, he will die, so you will have to switch, and lose all your Swords Dances, so try shifting your strategy a little.
You must use Rough Skin, San Veil is banned. Use Swords Dance in place of Surf, and I'd recommend Dual Chop, Dragon Claw, or Outrage in place of Dragon Rush for more reliability.
Looks good. But if you want to use it, you need a spinner. If you don't want a spinner, and want another fire type, I can recommend Infernape. Try:
Infernape@ Wide Lens
EV's: 252 Spd, 128 Atk, 128 SpAtk
-Fire Blast/Blaze Kick
Infernape@ Assault Vest
EV's:252 Spd, 128 Atk, 128 SpAtk
Trait: Blaze/Iron Fist
-Close Combat/Mach Punch
Infernape is a great Fire-type with the added bonus of not being weak to Rock. The first set allows for more power at the cost of lower accuracy, which is somewhat helped by Wide Lens. The latter set is good if you want to be ale to tank out more hits, and Iron Fist boosts Fire, Mach, Thunder, and Ice Punches. Shadow Claw hits Psychics and Darks hard.
I prefer Flamethrower or Fiery Dance instead of Fire Blast, generally speaking, if you do hang on to Volcarona
Definitely use Assault Vest. Try Dragon Claw or something in place of Focus Blast, Tyranitar's Special Attack isn't the best ever. But if you want to use Volcarona, replace him with a spinner. I generally like:
EV's: 252 Atk, 252 HP, 4 Def
Fairly self-explanatory bulky Rapid Spin set. Stone Edge over Stealth Rock due to it being a BW2 tutor move and therefore unavailable. Kee Berry increases Defense when hit by a physical move.
Set seems fine from here. No ideas for a better move than Toxic.
Hope I helped!
-Yours truly, InfernapeBurn