Praxis Blitz

This is a very straightforward deck. An aggressive option for Expedition capable of really explosive starts with some consistency. A few tips:

Mulligans
I recommend mulliganing aggressively. Aurelian supplier will draw 2 here against nearly any other deck, so you can often recover if you have to go down to 6. Your curve tops out at 3, and the games you'll win are about tempo before card advantage.

Market
Fire Conjuring is by far the most common pull from the market, allowing you to close out games on turns 4, 5, or 6.

Don't grab the stranger to deal with sling, you'll just fall behind. He is there for other problematic attachments.
(Just use Pause to bounce the dreaded sling, and keep pushing. It's a solid matchup for this deck.)

Tricks
Consider what answers you're demanding of your opponents. You can often bait them into using a sweeper or expensive removal while holding back Pause for Reflection or Kairos' Choice to save a Milos or Supplier.

If you like the deck - check out the Feln Podcast with Mijoza and I!

Have fun!