Well right now I'm getting enough willows to get myself to 70 fletching. I need about 6k more logs, so in between farming trips I'm cutting willows at Draynor. It's good because I can bank for tele runes and ectophial, run west to the patch, harvest/replant then do the cycle and 'Glory back to Draynor. Later, after I have 70 fletching, I'll probably farm during my Abyss runs.