This deck has 2 strategies, first of all get
Dragun of Red-Eyes as soon as possible, this card cannot be destroyed by any card effects and has a base ATK of 3000, if your opponent tries to special summon a stronger Monster to finish you, you can once per turn (quick effect) negate that effect and save yourself by discarding one card from your hand. After that your Dragun gets even stronger, 1000 ATK. The aim here is to summon
Dragun of Red-Eyes and activate his effect when you use "
Dark Magician" and "
Red-Eyes B. Dragon" as Fusion Material from your Deck due to
Red-Eyes Fusion.
Due to the construction of the Deck you have a 85% chance to summon Dragun of Red-Eyes in the first turn when you start. I didn't even factor in Reload and Left Arm Offering to this. You can get Red-Eyes Fusion by Normal Summoning/Special Summoning
Keeper of Dragon Magic, or Using
Red-Eyes Insight, or
Reload and a little bit of Luck, or in diar situation
Left Arm Offering, but avoid this if you can, since you will lose your entire hand and cannot negate effects without cards in your hand due to Draguns effect.
The second strategy is to get a fast and strong defense/offense by getting Magician Girls which give you some time due to their effects of special summoning other girls + magician souls with whom you can summon a dark magician instantly by activating its effects.