Starting the game with a Swamp and
Duress
or
Despise
is optimal because we can remove the most dangerous spells from our opponent's hand early on. The earlier we use these cards the better because we are most likely to hit a viable target while they still have 7 cards in hand.
Inquisition of Kozilek
is good at any time but the earlier we can use it the better. After the first turn or two, our opponent should be down to around 4 cards if they're actually playing. This is when we ideally hit with cards like
Blackmail
or
Mire's Toll
as they force our opponent to reveal most if not all of their hand as well as forcing them to discard one of our choice. It is never good to give your opponent a choice about anything in Magic, but in this case its more of an illusion of choice as these cards usually force a hand reveal. Later in the game after we have a win con out and our opponent is topdecking, cards like
Funeral Charm
and
Raven's Crime
come in handy since being able to choose the card discarded no longer matters.
Funeral Charm
is an instant which means we can use it to force our opponent to discard the moment they topdeck something, preventing them from playing anything during that turn.
