Again, this is how much you invest into your equipment. If it's just average, you're NOT going to be able to stand and tank bone dragon. You're going to need to cake spam for it, or have a healer. Most PvPers don't really care about PvE as much... and those that focus on PvE... I believe that they focus more on improving their weapons, and just getting armor to an average refinement/cheap refinement.And you are kinda forgetting the point that a Dragoon can tank nearly anything since they have the highest defense and HP in the game. SO yeah other than Paris they can kinda just sit there and spam skills. But whatever.
I'll concede for now. I plan on getting my Myrm to and Overlord and making a Dragoon.
Of course if you're just talking about arkah, pyth, etc... then sure, why not. Although their hp might be low enough for the Overlord's burst to beat the Dragoon's constant stream of damage.