My opinion
Stats
from lvl 1 to lvl 30:
1st stat Dex, 2nd Pow, 3rd Int
after lvl 32-34 to lvl 40
Dex, Int, Pow
After lvl 40 - pro Assasins advise to dump int, and raise Pow, Con, Dex.
Route: Scout>Rogue>Assasin
Skills that u use in PvP before lvl 30: Shadow, Fire, Sword, Twinblades.