Need Some Tips On My Build

I've been in termoil sence i've been playing with my R/N build i want to use skill I like but it seems i'm ignoring my necro side. Heres a list of skills I like to use. I only got 185 attriubte points and i'm level20. I'm not sure how to set up my points to fit my favorite skills and which would be most effective.

Ranger
Ignite Arrow
Penetrating shot
Poisen Arrow(elite)
Storm Chaser
Hunter's Shot
Punishing Shot(elite)
Charm Animal (i love my wolf)

Necromancer
Deathly Swarm
Putrid Expolsion
Wall Of Pain (the health degne one)
Winter(elite)
Rotting Flesh

No Attribute
Res sig (just feel I should have it)

First of all, go get those other 15 attribute points.

Don't know where to go. I did the one where you get 15 from the desert.

Once you ascend, and complete one of the ______'s Path quests, go to Droknar's Forge. Talk to Vanyi and get the Hero's Challenge quest from her. Then go to Copperhammer mines, or start at Iron mines and just follow Sanyi.