Way of Dark
Resilience - You take no damage from arrows or quarrels.
If you've noticed your opponent over-relying on their Bow or Crossbow, you now have recourse. You'll still be knocked back from their arrows or quarrels, but now you'll take no damage. Normally thief-types have the upper hand on you, but with Resilience you now have an invaluable tool against them. Complete the package by taking a secondary ability focused on mobility.
Leads to: Archfiend or Specter