Personally I don't think the build is as good as it could be for what a shadow knight can do. If you want to tank, generally you should be a dark warrior, but you can also do so as a SK. Reason I don't think it's good is cause of some of the skills you picked up/sacrificed points to get certain skills.
If you want a good one to level up with.. then...
http://www.dbocom.com/skillcalc.php?...03000240020002
and if you want one that will maximize the amount of damage you can possibly do, then
http://www.dbocom.com/skillcalc.php?...03300240023002
Fear alone is a good ability that can be powered up to increase duration, plus used at long range. The stun is inevitably useful as it can also be powered up to increase stun duration. Drain is also useful as can be used at range, and also while fear is active... which also helps balance out why I got Kaioken, because it's an attack increase, and with the abilities you have, youll be able to nullify the effect of the lp drain part of kaioken, increased rank also lowers the drain a small amount (Everything counts), and increases the attack you gain from kaioken. ..
Ok I'm done.. enjoy. lol
Edit: Also, in the 2nd build, there is 9 points left over as you can see, I personally would put them in the const/energy buff, 2/4 in the lp buff, and 3/3 in the lp passive buff.
Might I alsooooo add, that like most other stuff involving skills and the calculators regarding the abilities, they are outdated. Small example is the LP buff is either.. 8 minutes or 10minutes now, the passive lp buff gives you i think... 3-400 something hp. so yeah.