Engineer player looking to change
If you want a challenge, this class is definitely for you. If you actually want to do something related to player-versus-player I would suggest looking into your other option, the Mesmer, it is a lot more effective and can accomplish a lot more with equal skilled play.
Active: Mesmer, Warrior
Inactive: Guardian, Elementalist, Ranger, Thief (ex-main)
Leveling: Engineer, Necromancer
Inactive: Guardian, Elementalist, Ranger, Thief (ex-main)
Leveling: Engineer, Necromancer
Considering the upcoming balance patch i would avoid this class. As mentioned before try out a mesmer, it has a pretty ok skill cap and it’s generally much more reliable and useful in all gamemodes than the thief.