Flavour wise, I would have said that Death Strike by an Assassin is a death affect, and why I hear you ask?
Because your an assassin, your being paid to kill people, to kill people in a world where raise dead exists, and you're usually being paid to kill very wealthy or influencial people, who can affford raise dead. Now your average wizard isnt an assassin, so although he has access to the spells that cause death affects, he isnt the one people go to for an assassination.
If you can be raised form an Assassins Death Strike, it makes the ability pointless form a game world perspective, you're not going to pay an assassin to kill someone if the local clergy can just raise him again, you want him dead, and dead for good.
Its not always about the RAW, but also about the purpose of the Ability and the Prestige class. I know this is the rules forum, but taking the rules without context is pointless
Feegle Out
