Go first!
Use 'Condemned Witch' to react to your opponents turn (e.g. Gellenduo or Ariadne)
Know about Ariadne's destruction effect as well as her Pendulum one
Gain more time by setting 'Gellenduo'
Use 'Drastic Drop Off' against your opponents searches
Use Valhalla first turn, normal summon, and go for Number 27
Use Number 27's effect to summon high level machines and then summon 'Supercanon...' on top of it for some additional material
Summon, Utopia, Utopia Ray, and finally Utopia Lightning on one another for a guaranteed damage
Always try to setup the level 9 Parshath monster