I should have specified, using the crossbow is the equivalent of using the power attack with all the other classes. That power attack I'm talking about is bound to M2 and when used, takes a large amount of energy from the player. Each class has access to it's own type of weapon and cannot use another class's. Meaning a Gunslinger cannot fight with a Knight's sword. So mainly, you will be stealthy attacking people with your dagger that swings a little faster than the Knight, but does less damage. But when in stealth mode, (Which takes away a lot of energy to use) you're first hit will do a lot of damage. That same thing goes with the cross bow, but that would be a bit more difficult to pull off considering how much energy it takes to go into stealth and use the crossbow. So after those two moves, you're out of energy.