Nice it makes you think some stuff anew way Sain :). These added special stuff is meant to expand thematics of each Archfiend (or reinforce excisting one like in Galyxx). Also makes you use change shape ability to able to be in your ship (but then again you do not need to be inside ship to control it's weapons and crew assumingly has profession: sailor check ranks equal to your HD so they can handle whatever seafaring checks to sail).