This will make the fight a lot easier, just cast these when they run out. I had them lined up on a secondary bar. It also helps if you have a mod that keeps track of HoTs like Chronometer (http://www.wowinterface.com/downloads/fileinfo.php?id=6172)

/target eagle spirit
/cast Regrowth(Rank 1)
/targetlasttarget

/target hawk spirit
/cast Regrowth(Rank 1)
/targetlasttarget

/target falcon spirit
/cast Regrowth(Rank 1)
/targetlasttarget