MazeyNewsReporters
Templar's die by only Force Masters most of the time.
Harlequins can just barley 1 hit some Force Masters but without RM buffs it's a risky chance to try to 1 hit.
Force Masters 1 hit every class and can tank mostly everything but each others asals and possibly hops.
Arcanist's usually do around 200m+ without RM buffs and such, can kill suicides and things like that.
Blades and Crackshooters aren't usually seen around in siege, along with RMs, Psy's are very rare to see in siege, so it's all determined by what class you prefer to play. Good luck with your decision!