drk/nin can both kite and straight hold KV its not about the job as much as who can play the job. Even though Zan ls has a terrible reputation on ragnarok they can and have held KV with rdm's and drk's extremly effectively without even kiting. just holding it still.
/nin is not useless in a zerg since KV does petrify on hit and every single hp counts on a drk zerg specially if its kraken club drk that has most the hate. Don't feed me that BS that the chainspell stun hold every single attack and tp move through cause if you have ever been the dd holding the most hate during KV you would realize /nin is the smartest thing to bring to a zerg
So wait, You're telling me the DRK couldn't have been camping it solo, and kept tanking it after members showed up? Sounds unorthodox. (considering I saw him there one day camping against him, I know this is the case)