Everything that affects bows affectaffects crossbows as well (damage multiplier, etc.), even Deadly Aim
"Deadly Aim". Those perks that aren't immediately obvious work like this:
Hunter's Discipline
"Hunter's Discipline" - more bolts (from mobs who drop bolts in the first place)Ranger
"Ranger" - move faster while aiming and reloadingQuick Draw
"Quick Draw" - faster reload
Update: The mechanicThe mechanics of the weapons can be confusing.
- Bow: Ready-draw-aim-shoot-ready → draw → aim → shoot → ready.
- Crossbow: Ready-aim-shoot-reload-ready → aim → shoot → reload → ready.
Quick draw yields faster draw for bowbows and faster reload for crossbowcrossbows. Ranger lets you move faster while aiming with your bow or crossbow. The thing with a crossbow is that you aim an already loaded weapon, and with the bow, the draw action is part of the aiming. In the end, it'sthere's no real difference.