I'm wondering at what times people here are using Focus Fire as BM. I'm having trouble fitting it into my rotation currently. I have looked through other Hunter's logs but have found that there's no real set time people use it. Currently I use it during the last 3 seconds of my BW to allow my pet to get an extra Bite through the focus it grats but sometimes I won't have 5 stacks of frenzy before my next BW, which to my understanding is a DPS loss.
How do you use focus fire?