The core 35 cards of Praxis in Expedition are super broken.
2-2-2 Combust-Moth-Banish split since I prefer to draw a mix of removal (and Blightmoth is hard to cast). I didn't want to flood on Pioneers so I only have two and two Two-Face for higher Cultist density for Ark of Sol and for better blocking against aggro.
Crack is better than Salvo because the market options actually do something in a long game and it is frequently a Power Stone if cast turn 1 and the body has other sorts of uses that a small removal spell doesn't when you have sets of Jekk and Rectifier for removal.