The comment about Ill Omen was separate from the Portents comments.
edit: OH! Great use for Beguiling Gift. The old Holy (or other aligned) Arrows. IIRC, Pathfinder removes the Wraith clause but not the fact that it results in death, which is generally a boon to that tactic (unless you are a Gravewalker and want a new pet). Still book to head worthy, but RAW legal.
edit 2: I'm not sure Poison the spell was nerfed. The initial damage is lower (but higher in the end, but most fights don't last that long, could take advantage of the Witch's invisibility access), The 3.5 version allows 2 saves to negate it entirely, the 2nd having a different way to calculate the DC for some reason, the PF allows only 1. Not sure it's a GOOD spell, but not sure it's nerfed.