It's the price you pay for being able to kill almost anyone with 2-3 SB, if you get defense on kitty claws, you will give sinx advantage over other classes, plus as sninx you can always use backslide to escape a sure death.
Probably like most of the people who were just a newbie (as I didn't know anyone in the server), I did farm all of the things needed for the legendary quests. Now you can buy it from other players but most of the time it is expensive (for a newbie) so I suggest either farm all of the items needed or join events and if you're lucky, win tokens then sell them and buy the needed stuff for your quests. Goodluck and welcome to the server!