i notice no replies so i will offer u my faith... its on a great bow very fast attack speed and bow has 11 ed.
some advantages of great bow are lower req. and is much faster... u only neeed 140 or so ias to hit the very last breakpoint for a zon... while since gmb is slower u need 200 or so ias to reach last break point... plus base dam is only 10 off of gmb base.
stats are: 14/2/11ed lmk if interested