Phantom summoner : Lineage 2 General Discussions

I am playing a phantom summoner lvl 63 now and i was wandering if someone could give me some tips about how to best use it in pvp. I would glady appreciate any help. Tips can even be for a lvl 78 one..will get there .. sooner or later.
The biggest problem is that my Nightshade get's fear from WCs imediatly and runs away can i do something to prevent that ?