So I have a WF wiz and I want to take advantage of insta-kill abilities, FoD, Wail, etc. So I have greater necromancy focus feated, but now that I've reached lev 18, I'm wondering if PM is really worth it, as opposed to just getting my +DC from arcane mastery. So what are the real pros and cons of a PM vs an AM? I've been gone from DDO for a long time so feel free to explain things in basic terms.
Thanks in advance!