Help with Necro skills

I have a warrior primary and want to know how good, main of pain, is with warrior skills. I use swords so its fast and someone told me that mark of pain is really usefull with warrior primary. Thanks for the help

Correct me if I'm wrong, but Mark of Pain deals shadow damages to enemies near the affected foe. So this proves to be a bit problematic when used against spread out enemies (which occurrs more often in PvP). In a PvE environment, this is a great skill to have in your arsenal, due to the fact that PvE monsters tend to group together and focus in on one target. Overall the skill is quite effective, but as you can see, it depends in which environment you are using it for.

I use Mark of Pain with my R/N and it works really well