This is not korea server , is from j a p a n server :D
anyway is another game (another update) so maybe in NCWest some1 will make this in 6monts-year... :)
End is not solo, is with iss who made debuff to every mob... solo dw is one video from Korea, tyr with +16 bloody fist and full up shop buff to last stage, but he was also lvl 100 or 101, so also is not same game...
In Japan they have at the moment the same version as us (it's also an export territory), so with an out-of-party Swordsinger the video would in theory be duplicable on our servers.
Mesrine from the Korean Devianne server is indeed in a different category though. Here is him at lvl 100 truly soloing to stage 30, only with shop buffs and his trusty +16 Bloody fists: