The main strategies of the deck are the basic control and interruption plays that dark magician are known for, but with added spice. With your Dark Magic Circle, Eternal Soul and Magicians Navigation allowing you negations and banishment to your opponent the deck is a underrated rouge strategy. Nibiru and Skill Drain are in the deck to help control you opponent. Dark Sacrifice is a perfect card for protecting your Eternal Soul aswell as effectively searching Magicians Rod with its recycle effect while in the GY. Solemn Judgement is a no brainer, its always live whenever you see it and its a summon or Spell/Trap Negate.
Bond Between Teacher And Student is effectively a reverse sages stone, allowing you to summon Dark Magician Girl from anywhere, then allowing you a deck search to set your powerful advantage cards. Dark Burning Magic is without a doubt the best card to search for. Pot Of Extravegance is a must for this deck especially as it doesnt need the Extra Deck. However, due to the price I would also recommend the Spellbook Engine instead.
The Extra Deck is a the basic Dark Magician cards, containing Rank 7 XYZ's, Straving Venom being a Super Polymerization target, although depending on the match up, All your fusion monsters are SP targets. I could not leave my favorite Link Monster out of this deck, Black Luster Soldier- Soldier Of Chaos!. However, the MVP is 100% Beat Cop, Adding its token to Eternal Soul has saved me more times then I can count.
In my side deck are multiple cards i feel have their uses, Palladuim Oracle Mahad is perfect if you are going against a DARK attribute deck. Aswell as Palladium Oracle Mana adds more protection for your spellcasters. Other cards like secret village and epidemic virus can shut down your opponent before they get a chance to combat against your board.