In my opinion, it really matters what you want to do. If you plan on PKing with a large group / clan, high Str is better. If everyone ina group has high str, you have a good chance to kill a player before he can do anything. If you are looking for a good DMing character most people say Def > Atk > Str or Atk > Def > Str. In F2P I would personally sugest high Def, as DMing is better than F2P pking (what isn't?). Really, it all matters what you want.