bossesing prefer single target dmg, ET prefer AoE, if you want your character to excel at something you need to choose one, otherwise you’ll be jack of all trade and master of nothing.(jack of all trade isn’t bad for solo or doing mission, but less prefer in difficult content)
currently falconer is more of supporting class if you want to choose this class you might want some class that can benefit from falconer skll eg. X+circling combo
with ranger3 possible build I can think of are
->fletcher3
->rogue1>X>R7
->x>SR2