Rogues use 'bomb' spells that they can explode from a distance, using their pistols, whenever they like. These tactics require great patience. You will have to work out how to draw your opponent to where you need them to be, and maybe multiply the damage inflicted by activating several bombs in the same turn...
Rogues can be played solo but will be limited in lots of ways. As this class is very weak in close combat, you will have to very carefully plan ahead if you want to progress on your own. If you find yourself facing a monster or an enemy who can push back or change their position, you will be too far from your bombs and will not be able to trigger them, or your enemy will be out of range. You'll have to rely on your teammates to push your opponents into your bombs!