I disagree, Samurai is a god forspoken Kaitenless Shinten Spammer in PvE.
PvP is the Last Bastion for the Samurai to resemble a Fun Job and the Instant Kill LB is just a Part of it. I had it alot of times where I debuff trigger lb'd someone and only cut down like 70% HP that's supposed to be an instaKill. on CC I once witnessed a 5men kill from an Enemy Samurai and I wasn't even mad