If you want to kill good archers with 3-10 hits, you're welcome.
Even though Lower tier bows are not as useless as before, low PD builds are. I advice having at least 15 str - 5 PD, sometimes 12 str 4 PD works too, but usually not worth it. One great advice - test different builds with your skip the fun character.
If you go low PD the only choice is usually bodkins.
(also having at least 150-160 archery wpf is a good idea, for melee weapons ~100 is usually enough)
PS: For me archer assasin builds are usually associated with high str archers (like 27-24 str), because with small weapons it's really hard to deal at least some damage against higher then medium armoured opponents.
EDIT: mistyped PD and str