Forum:Card Selection for Spellcaster's Deck

I currently have a Dark Magician/Spellcasters Deck i've ran a few tests and have noticed some things i would want to change, though i'm stuck on what to put in and what to take out

Problem 1: I currently have Buster Blader in my side deck for Dark Paladin incase of dragons, i'm debating which card i should also include as a support for Buster Blader Option 1: Miracle Restoring Option 2: Emblem of Dragon Destoryer Option 3: Suggestions?

Problem 2: I currently run 1 Magical Exemplar and 3 Defender, the Magical Knight Option 1: Mantain the same number Option 2: Run 2 Magical Exemplar and 2 Defender, the Magical Knight Option 3: Suggestions?

Problem 3: I want to remove a spell card for another Magical Dimension, the three cards i'm debating to remove are Option 1: Thousand Knives (I run Dark Magician and it seems nice to freely kill one monster) Option 2: Mist Body (I use Magician's Valkyria,stalls time and gives me a chance to bring a second one out for lockdown) Option 3: Monster Reincarnation (Generally nice incase if something wrong happens and i need a card)

Suggestions and thoughts are welcome, and i thank everyone who comments and helps me.