Theres Already Topics im Sure you'll find the best one to fit you if you ready this
http://www.silkroadforums.com/viewtopic.php?t=55184
I would choose a different Class for which type of rogue you are. Like if your an Xbow Rogue then use Cleric for the Defense up, and the Healing since you sacrifice HP and Defense
and Rogue/Bard for the Dagger Rogue for the Noise and Moving March buffs to help you pass some mobs since you have to get in close so you wont get mobbed. O
Or even Rogue/Warrior if you want more Defense and some sheild defense at times of running away
And for the Quickest Kills Rogue/Warlock and the Raze series Can take your opponent out with a basic Auto Attack LULz