Although we here over and over again that new class stories aren't happening, it's cool to think that maybe some day it will, so this thread is dedicated to Class Ideas and Advanced Class Ideas
ENGINEER/SPECIALIST
The engineer is comparable to the Shaman from World of Warcraft, using Turrets and Medstations to Attack his enemies or Aid its allies with Buffs and Shields. The engineer on its own though, can defend himself using his shotgun and explosives to keep his enemies at bay. Although it uses a pet-like turrets, it still has access to its standard story companions.
I see it as being either a new class that can Advance into either using heavy armor and a turret probe that moves with the Engineer making the engineer more self sufficient[POINTMAN/MOBILE SPECIALIST], or use standard medium armor with far more durable although stationary turret that is far more self sufficient than the turret probe, meaning the engineer will rely on it more[ARTILLERY MASTER/TACTICIAN].
The class will serve a more defensive role if it decides on AM/TACT, and healing capability to go with it, making it a big team player for PvP and a valuable asset for PvE. On the other hand there is the PM/MS with a turret probe either dealing extra damage or supporting its teammates with small buffs and shield effects providing that sight edge necessary to push through the enemy team, or to tank through that last boss while providing cover to your DPS teammates as the adds start chipping them away
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