Tree of Savior Forum

Choosing last classes

hey ! Sorry this will be another “Help me” thread.
After going A1>R2, I decided to start working towards a Build purely PvE focused. What I made was the following :
A1>R2>R3>X>F1>M1
Thing is, I don’t know what to put as the X class.
Either go for A2 for multi shot and the buff, either go for Rogue for Barrage+Feint, for Scout for stealth or Fletcher for more AOE ?
What do you think ?
I could also go for A1>R2>X>X>F1>M1 and go with S2 or two other choices of the above. I’m pretty lost. Only thing I’m 100% sure about is A1>R2 and F1>M1.