FFXI is a crap game, sorry to say post lvl 50 is just a bore, I played it, quit as a lvl 55 samauri, that's what my sig refers to, Tachi is the samauris weaponskills(same thing as overdrives) and they are all tachi:blahblah usually twofold attacks, so Omnislash 2x

EDIT:Sorry forgot to say congrats and good luck :P