The Next Regionals - The Other Side

The main deck is definitely a challenge. However, the side deck is a different challenge. For each deck, I have thought of more than 15 cards I want to side. Prepare for a lot of copy-and-paste... This is what I'm thinking, for each deck:

Mermails:

2 Maxx "C" - Drawing the combo pieces to explode is quite beneficial. It's good against the mirror match, and other random decks like Wind-Ups.
2 Tragoedia - OTK prevention. Also good against the mirror match.
2 Snowman Eater - It's a water monster, so it has some synergy with Salvage. It helps fight Dino-Rabbits, Thunder King, and other random things.
3 Gemini Imps - I want to side this card to obtain an edge against the unfair Dark World deck. That's it.
2 Soul Taker - For random big monsters, Chaos Dragons and Heroes.
2 Twister or 2 Dust Tornado - I would side one or the other. Dust Tornado is slower, but hits more than Twister. It's a decision, indeed.
2 Gozen Match - For the decks that incorporate multiple attributes to succeed. Dino-Rabbits are an example.
2 Royal Decree - For the decks that play more traps than average.
2 Compulsory Evacuation Device - It's a great trap card, especially against extra deck cards. It wins games.
3 Mind Crush - A lot of decks search and reveal cards. It's pretty good.

Total: 22

Fire Fists:

2 Thunder King - A lot of people wouldn't see this card coming in Fire Fists. This deck also has enough protection to keep it alive.
2 Maxx "C" - Good against the decks that special summon a lot. Enough said.
3 Dimensional Fissure - This will wreck Mermails and any other deck reliant on the Graveyard. Fire Fists can still operate under Fissure, unlike Macro.
2 Soul Taker - For random big monsters, Chaos Dragons and Heroes.
2 Twister or 2 Dust Tornado - I would side one or the other. Dust Tornado is slower, but hits more than Twister. It's a decision, indeed.
3 Mind Crush - A lot of decks search and reveal cards. It's pretty good.
2 Fiendish Chain - It has a particular edge over Mermails. It's also good in the mirror match, and other random decks.
2 Deck Devastation Virus - Since I'm playing Vorse Raider, I can afford to side this card in against decks that play multiple weak monsters.
2 Rivarly of Warlords - This deck is primarily filled with beast-warriors, so siding this cards against decks that multiple monster types is an advantage.

Total: 20

Dino-Rabbit:

2 Thunder King - Though it could conflict with Macro, it will still at least stop searching. The deck has enough protection to protect the King, so it's definitely noteworthy.
1 Snowman Eater - This card is amazing against the mirror match, and some other decks. It's a level 3 monster, so it helps manipulate rank 3 monsters, particularly Leviair.
1 Gorz - I would probably side in this card against decks with big monsters, unless I'm playing 3 Macro and Fiendish Chains...
2 Forbidden Chalice - More effect negation under Macro, and can be activated during Damage Step...
2 Soul Taker - For random big monsters, Chaos Dragons and Heroes.
2 Twister or 2 Dust Tornado - I would side one or the other. Dust Tornado is slower, but hits more than Twister. It's a decision, indeed.
2 Royal Decree - For the decks that play more traps than average.
2 Compulsory Evacuation Device - It's a great trap card, especially against extra deck cards. It wins games.
3 Mind Crush - A lot of decks search and reveal cards. It's pretty good.
1 Macro - I'm probably going to use 2 in the main deck, so I have to side the 3rd for decks like Mermails, Fire Fists and Dark Worlds.

Total: 18

Dark Worlds:

2 Maxx "C" - Good against the decks that special summon a lot. Enough said.
2 Gemini Imps - Only 2 is needed against the mirror, and I would probably only side them for the mirror.
2 MST - I would need to side them for bullshit like Soul Drain and Macro.
2 Twister or 2 Dust Tornado - I would side one or the other. Dust Tornado is slower, but hits more than Twister. It's a decision, indeed. Also, defense against Soul Drain and Macro.
2 Dark Smog - Another discard outlet that banishes monster in the grave...
1 Deck Devastation Virus - Because I only main 1...
1 Eradicator Epidemic Virus - Because I only main 1...
2 Gozen Match - For the decks that play different attributes.
2 Skill Drain - For the decks that heavily rely on monster effects activating on the field, like Fire Fists.

Total: 16

3 Old Vindictive Magician - This card is a method to destroy Thunder King, Naturia Beast, and other annoying monsters.
1 Breaker - For decks that play many annoying spells/ traps.
2 Maxx "C" - For the decks that special summon a lot of monsters.
3 Dimensional Fissure - This deck is unaffected by this card for the most part. It hits Mermails and Dark Worlds, and other random decks.
3 Compulsory Evacuation Device - It's a great trap card, especially against extra deck cards and Thunder King. It wins games.
3 Mind Crush - A lot of decks search and reveal cards. It's pretty good.
2 Royal Decree - I need to stop traps that could damage this deck.
3 Trap Stun - Read why I'm playing Royal Decree. Only difference is that MST can't be chained to it.

Total: 18

These are my side cards I'm consider. Please leave advice. I would like to know what should come out, or what other cards should go in...