Assassin/Ninja Help General Advice and builds for Lv.67 Assassin

Looking for a good build that preferably also gives some good combat xp boosts.
I can't post links yet so...
Scarlet Veil, Mail of the Sweltering, Greaves of Honor, Bad Wolf, Morph-Emerald, Warsong, Bovine Cuff, Renda Langit, Locrian
all t6t6
Any suggestions for powders, since right now I'm just slapping on tier 6 thunder powder on everything since I feel like thunder = assassin somehow
Should I prioritize doing quests or should I also do some mob grinding?

 

if ur lvl 67 (six sevennnn) raids are also a real good xp source (100k if im right) but if u wanna have fun do quests, if u just want a lvl 105 real quick u should grind mobs

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it is also not worth to put powder on ur armor in mid game (only if u have a good build)

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just use morph for leveling