Here‘s some things I figured out after finishing the game that aren‘t immediately obvious. Hope this helps in your runs and please feel free to comment your own tips!
1- Killing a boss cleanses corrupted artifacts and removes their negative traits. One more reason to actually pick them up.
2- Acolytes wager can be used to remove unwanted artifacts from your inventory. Just open the Equipment tab, highlight an artifact and hold square to remove it.
3- The numbers for collected halcyon, audio- and textlogs in the world dial actually counts for the entire biome, not just the selected teleporter.
4- Opening the database during the eclipse makes the redacted text passage readable.
5- It is possible to safely extract from a biome without killing it‘s boss again, but only in a few situations. The swamp has a teleporter near the red tree that brings you back to the passage without having to fight legion again.
6- Don‘t sleep on weapons with stagger effects. Shotguns open your enemies for melee takedows and let you dispatch large enemy groups quickly. For these takedowns Arjun instantly teleports to his target closing huge distances while also shortly becoming invincible.