So I´ll be the first to give some opinion. I play also a necro. not as main and only in sPvP but I really like necros and play pvp since start of the game, although my main is a mesmer, but thats unimportant.
I´m playing a very similar build atm. I tried all kinds of builds but I´m stuck on conditionnecro cause I think necro has to be a "dot dot dot down" kind of class. I think what you should know is that Fear ticks only once per second so your goal is to get fear duration at least 1 sec longer. therefor you trait Soul Reaping IX. But then I would recomend also to Use runes of the necromancer for an editional 20% fear duration buff and Soul Reaping I for an editional Fear. Also Reapers Protection is absolutly Powerful. not only the additional fear also the opener from the enemy is neutralized.
Furthermore I would use Utility skills Corrupt boon + epidemic + random cause of already mentioned "dot dot down" reasons. In My build I also trait shorter CD on Corruption skills cause I have 3 of them. I think 33% bleed duration on zepter is not too important in times of condition removal.
So my traits are like these: try it and love it http://gw2skills.net...ElNKXUyoGLcqYWB
PS: there is an in depth guide out there by a really good necro called nemesis. check it out:
I don't see why you would use rune of the necromancer. The extra 20% fear duration is redundant, you already have a bonus 100% to fear duration. You should use rune of the nightmare for the 5% chance to proc fear when hit instead.