The crossbow has a reload time of roughly 18 seconds and is indicated by the rope slowly sliding closer to the user. It takes one hit to knock an opponent down and two to kill. Due to its long cooldown, it's advised to stomp on knocked down enemies.
The crossbow is a projectile weapon, requiring users to factor in projectile speed when aiming at enemies. Predict the movement of enemies and aim in front of them so that the projectile will hit. A good crossbow user must be able to kite or dodge incoming enemies and hit most of his shots.
When reloading, make use of your throwables to repel opponents. The greatest threat to a crossbow user is another ranged weapon. Eliminate crossbows and harpoons before targeting melee wielders.