Current Extra Deck (Dark Reverse Junk and Debris)

This is the current Extra Deck for my Dark Reverse Junk and Debris:

Red Dragon Archfiend
Colossal Fighter
Thought Ruler Archfiend
Stardust Dragon x2
Black Rose Dragon
X-Saber Urbellum
Ancient Fairy Dragon
Goyo Guardian
Iron Chain Dragon x2
Magical Android
Sea Dragon Lord Gishilnodon
Junk Warrior
Armory Arm

As soon as Hidden Arsenal comes out, it will become this:

Mist Wurm
Red Dragon Archfiend
Colossal Fighter
Thought Ruler Archfiend
Stardust Dragon
Black Rose Dragon
X-Saber Urbellum
Ancient Fairy Dragon
Goyo Guardian
Iron Chain Dragon x2
Brionac, Dragon of the Ice Barrier
Magical Android
Ally of Justice Catastor
Armory Arm

Obviously, with the Synchro Monsters from Hidden Arsenal, the deck will become much more powerful. However, what I wanted to bring to your attention is this:


Why two Stardust Dragon? I barely use one...

I'm trying to find a card that I can use instead for now. Two Stardust Dragon is really unnecessary in this deck (unless Starlight Road comes to the TCG...), so I was thinking about Exploder Dragonwing, Power Tool Dragon, another Ancient Fairy Dragon, Arcanite Magician, another Iron Chain Dragon, Revived King Ha Des, Doomkaiser Dragon, Queen of Thorns, Chimeratech Fortress Dragon, or Gladiator Beast Gyzarus. I would use Trident Dragion, but I don't have one, so I'm stuck with those as my choices. So far I'm leaning towards Queen of Thorns (I'm testing out Hedge Guard in the deck), but I'm still not sure. I'd appreciate suggestions.