I really like this build, a lot of ranged kd, but i don't think that he needs speed, right now critical damage is better, and i don't think that you can kill a SK using speed, that why i'm going to focus in critical damage and kd, and offer this build:
http://tools.dboglobal.to/?tool=Skill-Calculator&class=Fighter&build=060130410110010100104010000435001551044000004500000
You have kd, both stuns, both needles, kaio for a quick burst and hit rate pasive is really needed, as a fighter you have low hit rate equal to be more propense to fail attacks, i suggest opening maxed opening roar for arena, you can charge really quick and throw a nice kd after a stun, attack, stun, attack, attack, kd.
Do whatever you want with the 3 sp that are left, you can use storm strike with 4 sp for pve and then you can use a three reset skill books on it.
Of course this is Crit build, if you also want pvp speed (you need speed weapons) i suggest this:
http://tools.dboglobal.to/?tool=Skill-Calculator&class=Fighter&build=060110410110010100104010000414001551144400014500200
Because i don't think that you would hang with 35 second of just thunder, 20 are more than enough