It has been a long time since I've played a Pale Master. The main reason I haven't is that I absolutely loved the SLAs (especially Necrotic Blast) but for a long time they didn't do very good damage and were mostly a waste of AP. I know that now things have changed and they no longer use HP and now scale with 100% spellpower and can use metamagics.
How are they now? Do Pale Masters nowadays bother using those abilities? I'm currently using an Abyss Warlock to have fun with undead stuff, but it's not that great as you can imagine from others' feedback.