Runescape: Willow, Oak, or Yews?

I am wc 90, but i have a problem. Willow, is currently what i am still cutting because it is fast and easy to get. I havent cut oak in a long time. I cant use yews because with the yews i can get at (Im not a Member), I only get like 7 logs an hour. Which one should i use, or any other suggestions? Would help out alot!