First and fore most., there is no such thing as an Elf Blade taker, they are not allowed to be blade taker, only humans.
I agree with you being full dex for Crits and eva, but if you want to become blade taker you must use the Restat Scroll.
heres a link(if link does not work, copy paste)
http://luna-online-g...s-job-tree.html
http://forum.mmosite.com/thread/2/2/20090408/Luna_Online_HumanElf_Rogue_JobProf_tree-4da83391199d2de13-1.html