Since the spins are based on the deck of your opponent you can just use the percentage that each card appears in a FG deck to see its likelihood of being won from that particular FG.
These percents are based on the decks as listed in Teffy's post and are arranged from most prevalent to least. Towers are listed last.
Supernova 11.3%
Ray of Light 11.3%
Fallen Druid 7.5%
Chaos Power 5.7%
Improved Mutation 5.7%
Dissipation Field 3.8%
Werewolf 3.8%
Maxwell's Demon 1.9%
Amethyst Dragon 1.9%
Discord 1.9%
Unstoppable 1.9%
Explosion 1.9%
Congeal 1.9%
Improved Steal 1.9%
Quantum Tower 18.9%
Amethyst Tower 18.9%Black Hole 12.8%
Elite Charger 8.5%
Gravity Force 8.5%
Archangel 8.5%
Elite Otyugh 4.2%
Gravity Nymph 4.2% (Relic)
Elite Armagio 2.1%
Massive Dragon 2.1%
Unstoppable 2.1%
Titan 2.1%
Improved Blessing 2.1%
Morning Glory 2.1%
Gravity Tower 40.4%Pest 20%
Siphon Life 20%
Fractal 20%
Improved Steal 6.7%
Improved Dusk 3.3%
Eclipse 3.3%
Electrocutor 3.3%
Aether Tower 23.3%Fate Egg 12%
Chaos Power 10%
Supernova 10%
Rewind 8%
Electrum Hourglass 6%
Maxwell's Demon 4%
Fallen Druid 4%
Eternity 4%
Amethyst Tower 26%
Time Tower 16%Explosion 16.7%
Morning Glory 16.7%
Animate Weapon 13.9%
Improved Miracle 8.3%
Light Tower 36.1%
Burning Tower 8.3%Micro Abomination 15.8%
Supernova 15.8%
Butterfly Effect 7.9%
Discord 5.3%
Shockwave 5.3%
Pest 5.3%
Purple Nymph 2.6% (relic)
Black Hole 2.6%
Protect Artifact 2.6%
Quicksand 2.6%
Rage Elixir 2.6%
Physalia 2.6%
Congeal 2.6%
Elite Deja Vu 2.6%
Fate Egg 2.6%
Thunderbolt 2.6%
Quintessence 2.6%
Amethyst Tower 15.8%Forest Spectre 10.7%
Feral Bond 8.9%
Congeal 8.9%
Twin Universe 8.9%
Abyss Crawler 5.4%
Puffer Fish 5.4%
Ulitharid 5.4%
Elite Phase Dragon 5.4%
Improved Heal 3.6%
Quintessence 3.6%
Jade Shield 1.8%
Jade Staff 1.8%
Water Tower 17.9%
Aether Tower 12.5%Minor Phoenix 20%
Explosion 13.3%
Fractal 10%
Ruby Dragon 6.7%
Fire Lance 6.7%
Firestorm 3.3%
Thunderbolt 3.3%
Burning Tower 36.7%Leaf Dragon 11.8%
Feral Bond 11.8%
Ray of Light 11.8%
Jade Dragon 7.8%
Giant Frog 7.8%
Elite Cockatrice 7.8%
Epinephrine 3.9%
Jade Shield 2%
Jade Staff 2%
Emerald Tower 33.3%Feral Bond 12%
Elite Queen 12%
Fire Lance 6%
Animate Weapon 6%
Eagle's Eye 6%
Fahrenheit 4%
Emerald Tower 32%
Wind Tower 22%Twin Universe 13.3%
Phase Recluse 13.3%
Unstoppable 8.9%
Phase Shield 8.9%
Massive Dragon 6.7%
Elite Immortal 2.2%
Electrocutor 2.2%
Elite Phase Dragon 2.2%
Aether Tower 28.9%
Gravity Tower 13.3%Graviton Firemaster 17.1%
Unstoppable 8.6%
Elite Otyugh 8.6%
Elite Charger 5.7%
Explosion 5.7%
Elite Armagio 2.9%
Gravity Shield 2.9%
Titan 2.9%
Gravity Force 2.9%
Firestorm 2.9%
Gravity Tower 40%Fire Lance 10.3%
Explosion 10.3%
Lava Destroyer 10.3%
Brimstone Eater 6.9%
Fire Spectre 6.9%
Heavy Armor 5.2%
Protect Artifact 3.4%
Firestorm 3.4%
Rage Elixir 3.4%
Ruby Dragon 1.7%
Fire Buckler 1.7%
Fahrenheit 1.7%
Burning Tower 34.5%Vampire 14%
Graveyard 11.6%
Retrovirus 9.3%
Bone Wall 9.3%
Bloodsucker 9.3%
Eclipse 9.3%
Vampire Dagger 2.3%
Obsidian Tower 34.9%Light Dragon 7.9%
Improved Blessing 7.9%
Improved Miracle 7.9%
Elite Queen 7.9%
Leaf Dragon 5.3%
Elite Pegasus 5.3%
Jade Dragon 2.6%
Jade Shield 2.6%
Jade Staff 2.6%
Solar Buckler 2.6%
Morning Glory 2.6%
Light Tower 23.7%
Emerald Tower 10.5%
Wind Tower 10.5%Retrovirus 11.3%
Ray of Light 11.3%
Deadly Poison 9.4%
Condor 5.7%
Graveyard 5.7%
Improved Plague 5.7%
Bone Wall 5.7%
Archangel 5.7%
Ivory Dragon 3.8%
Arsenic 3.8%
Flesh Recluse 1.9%
Improved Miracle 1.9%
Bone Tower 28.3%Shockwave 16.2%
Abyss Crawler 10.8%
Arctic Octopus 10.8%
Inundation 10.8%
Permafrost Shield 5.4%
Arctic Dragon 5.4%
Congeal 2.7%
Poseidon 2.7%
Eagle's Eye 2.7%
Water Tower 32.4%Elite Shrieker 12.8%
Basalt Dragon 10.6%
Gravity Force 10.6%
Unstoppable 8.5%
Protect Artifact 6.4%
Diamond Shield 4.3%
Pulverizer 4.3%
Stone Tower 42.6%Unstable Gas 18.8%
Eagle's Eye 15.6%
Animate Weapon 12.5%
Fire Lance 6.3%
Explosion 6.3%
Fire Buckler 3.1%
Wind Tower 37.5%Pharaoh 20%
Unstoppable 6.7%
Rewind 6.7%
Precognition 6.7%
Turtle Shield 3.3%
Eternity 3.3%
Time Tower 53.3%Ray of Light 16%
Improved Blessing 16%
Elite Deja Vu 16%
Twin Universe 10%
Electrum Hourglass 8%
Improved Miracle 6%
Mirror Shield 4%
Morning Glory 4%
Aether Tower 20%Electrum Hourglass 8.3%
Werewolf 6.7%
Elite Graboid 6.7%
Forest Spectre 6.7%
Explosion 6.7%
Gravity Force 5%
Congeal 5%
Improved Steal 5%
Improved Miracle 3.3%
Eagle's Eye 3.3%
Thunderbolt 3.3%
Quantum Tower 40%Puffer Fish 11.1%
Deadly Poison 9.3%
Physalia 5.6%
Abyss Crawler 5.6%
Congeal 5.6%
Permafrost Shield 3.7%
Arctic Octopus 3.7%
Ulitharid 3.7%
Twin Universe 3.7%
Arsenic 1.9%
Ice Lance 1.9%
Purify 1.9%
Poseidon 1.9%
Arctic Dragon 1.9%
Water Tower 33.3%
Aether Tower 5.6%Elite Graboid 13%
Quicksand 13%
Rewind 8.7%
Gnome Gemfinder 6.5%
Steel Golem 4.3%
Basalt Dragon 4.3%
Protect Artifact 4.3%
Elite Antlion 2.2%
Diamond Shield 2.2%
Pulverizer 2.2%
Granite Skin 2.2%
Silurian Dragon 2.2%
Stone Tower 34.8%
Cards making up the greatest portion of individual FG decks (over 10%)
Fractal (20%, 10%)
Minor Phoenix (20%)
Pest (20%)
Pharaoh (20%)
Siphon Life (20%)
Unstable Gas (18.8%)
Graviton Firemaster (17.1%)
Explosion (16.7%, 13.3%, 10.3%)
Morning Glory (16.7%)
Shockwave (16.2%)
Ray of Light (16%, 11.8%, 11.3%, 11.3%)
Elite Deja Vu (16%)
Improved Blessing (16%)
Supernova (15.8%, 11.3%, 10%)
Micro Abomination (15.8%)
Eagle's Eye (15.6%)
Vampire (14%)
Animate Weapon (13.9%, 12.5%)
Twin Universe (13.3%, 10%)
Phase Recluse (13.3%)
Elite Graboid (13%)
Quicksand (13%)
Black Hole (12.8%)
Elite Shrieker (12.8%)
Feral Bond (12%, 11.8%)
Elite Queen (12%)
Fate Egg (12%)
Leaf Dragon (11.8%)
Graveyard (11.6%)
Retrovirus (11.3%)
Puffer Fish (11.1%)
Abyss Crawler (10.8%)
Arctic Octopus (10.8%)
Inundation (10.8%)
Forest Spectre (10.7%)
Basalt Dragon (10.6%)
Gravity Force (10.6%)
Fire Lance (10.3%)
Lava Destroyer (10.3%)
Chaos Power (10%)