Realization =O

[Firepower]

I think it would be unlikely to have Raubahn as Drk trainer.

Using Raubahn as the DRK trainer would be difficult as it would require him to be situated in Uldah near the sultana's chambers to maintain continuity with the previous story, if you just got to 30 and want to unlock DRK he would still need to reside with Nanamo since the recent events would not have transpired yet, if you was post main story he would be locked away and if you go further into Heavensward he would be possibly be somewhere else creating a very strange set of places for him to be located to unlock the job and further quests.

I don't see Pipin as the Drk trainer either as he seems far too pre-occupied with other things, plus he uses a standard sword much like pld and if they really wanted to tease a drk trainer they would give them a greatsword much like they did with yugiri and thancred and ninja.