daggers do more damage but since u have no range u get hit much more often and with grinding with the pot dely u cant use DD with dagger when fighting giants etc, daggers do very good in pvp the stealth skill has a nice passive ware the 1st hit u do (dont do posion it will make ur passive not work on 1st it) has a increased phy witch does major damage, u can kill ppl 10+ lvls highier then u with 1 hit useing i think the skill was prick and criting a str is nice also, and all that with npc white clean gear
u have to remember tho that adding dagger will really make u short on sp witch after lvl 40 starts to go up alot,
use this
http://www.nivlam.com/euro/ to calculate how much sp will be needed, personally its no fun having no sp to lvl up skills i hope u have a sp ticket and no sub class
hope i helped some..
i quit my rogue at 68 long time ago btw
