With all the new dual wield gear and the ease of getting haste to 25 % ++ K club offhand would be very fast. I think ninja would benefit the most from a K club but I don't know.
If anyone has a K club do you use it or if not why not? I would assume you can get 100 tp faster then other weapon setups. (my thf has 30 % triple attack and uses i119 mainhand and blitto needle 150 delay offhand and it takes about 10-15 seconds to get 100 tp.) Back at the 75 cap I had 100 tp in 10 sec with K club only 15 % haste and no dual wield gear. Obviously the K club is not so good for tougher mobs, but with trust npcs its gotta be fun.