Now for Samurai. That seems rather...predictable

As a Tank: Let says Shogun was implemented. The crossclasses would need to be GLA for Provoke and MRD for "default".

As a Melee DPS: Samurai would still wind up needing Blood for Blood, Invigorate and Internal Release, so they would wind up with PUG and LNC

However it's possible that the class will have its own more thematic variants. allowing other crossclass branches. Like say ARC for Raging Strikes or ROG for Perfect Dodge. but probably unlikely bar mixing u the effects (Like say a skill that increases crit chance and damage recived)