You can use your Insight score when making a Deception check, or your Deception score when making an Insight check.
In addition, you can't make Charisma (Deception) or Wisdom (Insight) checks with disadvantage while you aren't deafened or unconscious.
When you succeed on the contest made as part of the Discern action, you can use your Sneak Attack feature against the target for 1 minute.
You have advantage on any Wisdom (Perception) or Intelligence (Investigation) check until you take the Move action.
You are imbued with the detect magic and find traps spells while you or the space you are perceiving is in bright light, choosing Intelligence, Wisdom, or Charisma as the spellcasting ability for these spells.
When you use your Sneak Attack feature through your Insightful Fighting feature, the damage of the Sneak Attack feature increases by a number of d6s equal to your choice of your Intelligence, Wisdom, or Charisma modifier.