[3.5] Struggeling to find the right build

I cant find a build fit for me. Im currently just dying really fast and the last boss i fought against just one hitted me (Justicar Casticus), still killed him though.
I really want to play with "Blade Flurry" and dual daggers.
I dont really care about other skills and equipment because i dont know if its smart to have armor and evasion as a Shadow, 294 armor and 294 evasion on a equipment part for example.
Currentlly im level 47.