My pleasure bro.
There is not a whole lot of bossing in this server, we basically will only have Papalatus, Pianus and Zakum. White Knight absolutely destroys Pianus and is probably highest dps. Unfortunately due to lack of elemental weakness on Pap and Zakum White Knight is one of the lowest dps when it comes to these two.
Not sure if it actually matters too much though, I know Papalatus is trash exp wise so you dont really miss out on a lot there and he does not really drop anything that is of value for a White Knight. I have no idea how viable Zakum is in terms of experience at a higher level, Chief Bandits do most of the work with Meso Explosion.
I only see WK having a true disadvantage if they change the higher level xp curve to a point where its reasonable to continue grinding at a high level where Zakum is viable to grind for experience.
Non related to bossing I think the biggest disadvantage you should consider is the fact that they are reworking the party experience bonus which will make big Goby parties the best spot to grind for sure, which you will never be able to take part of.