Okay, it's a day late, but I wanted to respond to this one about Harm:
Shard O'Glase said:
Slay living is one level lower and kills you on a failed save. Yeah the I saved damage is worse, but the I didn't save damage is better. This is about on par of slay living not one level higher. Ultimate suckage no, but over nerfed a bit yes.
Slay Living can't target nonliving creatures.
> It says "Target: living creature touched", so this'd rule out nonliving targets like Constructs or Undead.
> It's a death effect, which means Constructs and Undead are immune to it anyway.
> It also requires a Fortitude save and doesn't affect objects, which means that, yet again, Undead and Constructs are immune to it.
Being a death effect, it's also stopped cold by the spell Death Ward.
Harm is not only usable on Constructs, it has the added benefit of acting as a Heal for undead. And, unlike Slay Living, it's on the Druid list as well.
Is this difference worth a spell level? Maybe not, but they're definitely not on the same level IMO, and that's before arguing the merits of a Will save vs. a Fort save.