alright, to clear up any questions of what kind of L.W. weapon to use blunt, slash... which is beter for groups, which is beter for battlegrounds/frontier. this answer is simple:
ALWAYS carry both blunt and slash with you above level 20'ish... depending on bonus to hit you get on certain monsters/armor switch between the two. it will save your life.
Large Weapon is very nice because of the fact you get BOTH slash and Blunt in one skill.
-Suishi TheMarinated 32champ Bedevere-