Also they're spiritual DPS, not physical, don't waste SP in skills you can't fully utilize =)
As Gojira says, they have enough troubles as it is competing with the bigshot DPS classes.
Test server doesn't miraculously make SK a tank and physical fighter.
SK leans to Spiritual attacks, the axe also has more spiritual then physical damage.
SK has a lot of crowd control making them usefull in PvP
Looking at those points buffing your defense extensively will cause you to lose on valuable DPS, putting points in physical skills will cause you to lose on valuable DPS.
Aim on spiritual attacks, crowd control and damage increasing buffs/debuffs.
Basicly Gojira's build is a good place to start.