Rogue: 
Silent Expert
Stealth Extention: Extends the period of time you remain in Stealth. Max it.
Stealth
Stealth: This is an important skill to have for jobbing. Can give you a favoring hand. Max it.
Destealth: Detect other rogues in stealth. Max it, as well.
Scorn: Makes it so whoever you use this on, they attack you. Can save your group member's life in a group pvp basis. Get lv1 of both scorn and gross scorn.
Poison 
Poison Field / Trap:This is mainly only for 8/8 lvling pts. These can keep the aggro on you while the ints kill the mobs. Max both Trap / Field. As for the Poison Circle, a cleric comes more in handy, since holyspell isn't weapon dependant (for the one who casts it, unlike poison circle), so skip getting poison circle.
Mask Change
Monster Mask: Optional. Can get monster mask to lv3 to be able to make kokoru masks (helps in jobbing).
Crossbow Expert
Max all the passives and Crossbow Extreme.
Crossbow
For the skills, max all except Fast shot / Rapid shot. (optional to max them). Fast shot's there for luring in 8/8 pts, can do fine with just lv1 of it.
Silent Expert 
Max Dagger Power Up, Hawk Eye, Stealth Dagger, Quick Step, and Dagger Desperate.
Dagger Charge
For skills, Wounds / Mortal Wounds, Combo Blow / Butterfly Blow, Scud, and Prick are your main useful skills.
Screw can be optional, as it can stun (more useful if you have disease on someone). Spinning can be helpful at times, especially during the cooldown of your more powerful attacks.
