hunter bow if archer skel or racial damage cards, just do the math...
+5 hunter bow = 150 atq; +1 archer skeleton card = 1.1*150 = 165 atq; +1 20% racial damage card = 1.2*150 = 180 atq.
+5 gakkung bow = 125 atq; +2 archer skeleton card = 1.2*125 = 150 atq; +2 20% racial damage card = 1.4*125 = 175 atq.
are you sure about the calculation sir?
I am using this simulator
http://calc.irowiki.org/
showing that +5 gakkung [2] AS2x give higher DMG output than +5 hunter bow [1] AS1x
so the DMG output will be
arbalest 2AS < Hunterbow 1AS < gakkung 2AS