[Returned after long break (assassin) need help]

Hello,

 

so i have stopped playing for long time (can't remember which patch was my last one) anyway,

guys i need help to know what to do now.. i assume i need to reach max level if changes has happened,

 

ok, so i logged in my level is 55 assassin HM 17 with 1251 AP (Currently using Serpent Skill Build)

Raven Dagger         Stage 9

Destiny Ring            Stage 3

Destiny Earring       Stage 3 
Destiny Necklace    Stage 3

Tiger Bracelet          Stage 6

Eternity Belt             Stage 4
Hallow Gloves
Awakened Ascending Soul

Courage Soul Badge

Awakened Gusty Hongmoon Pet Aura

Full set of Virulent Soul Shield,

 

what should i do when i reach Max Level

what Weapon path should i go 

PVE or Raid?

which one is cheaper and faster to do, at the end of the PVE path i can go to Raid path and continue to thornbreaker,

 

also what do you recommend i do first before making the weapon, should i change other items  and what is the currently BiS. 
which skill build do more dmg, Serpent or Shadow