Right now I’m playing A>R3 lvl110 Str/Dex 2:1 All Bonus on Con
My plan’s A>R3>?>Falconer>Musketeer
What’s better for rank5
A2 - For save SP use while main skill on cd + swift step for cri
Rogue - For snake hit , Shotgun feint combo
or else.
and still not sure for stats s/d 2:1 or 3:2
Please give me some advice.
I’m not sure about musketeer synergy on any of them…
but if you are getting falconer and planning on putting lvl 5 circling.
atleast lvl10 multishoot for sure you will enjoy it. 
falconer with circling loved by everyone on a party they are always amazed with the fountain of yellow 4 digits showing on their screen.
i went the a>r3>rogue route, and barrage+feint served me very well leveling up to 235 atm.
a2 might be nicer on paper for the swift steps attribute, but couldn’t imagine how much more annoying it would be to only rely on a naked barrage till lv225~