DM OTK strategy:
1. Activate the card Salvation, then set Eternal from your deck.
2. Activate Circle to add 1 DM or any spell/trap (Navigation or Servant) that mentions it in its text.
3. Summon Rod to add either Navigation or Servant to your hand (different from the other you added with Circle).
4. Activate Branded Fusion to summon Lubellion, then use Lubellion to discard either Navigation or Servant to summon DMtDK.
5. Use Souls to dump DMG the GY to summon itself, then use Souls effect to draw 2 cards (by sending 1 spell/trap from your hand and Salvation to the GY).
6. If you brick, use Illusions effect to add Timaeus to your hand, then return 1 card. Now tribute Souls to summon Timaeus.
7. Activate Servant to search DM, then draw 2 cards (since you got DMtDK on the field and DMG in the GY). Now use Timaeus effect to summon Dragoon for your endboard.
8. Now your endboard is unbreakable board with Eternal & DMtDK, banish ready with Circle, and negate ready with at least two Navs in the GY and one Dragoon on the field.