Let's see on Peace of Mind...
It doesn't do anything to (Mind-Affecting) stuff, which would actually be usable (not good, but usable) since "stay there useless" is still better than "kill your friends".
Uh... Magical traps? You can generally afford to wait those out. Too bad Sepia Snake Sigil would be worse (you're inactive twice as long but still need to eat) and for some reason, conjuration (creation) (and Temporal Stasis with the same effect is transmutation.). I recall at least one Phantasmal Killer trap in an AP, but even that causes issues (what's twice instant?).
Edit: Found a real stinker: Vestment of the Champion
. Personal only magic vestment at a reduced level for Paladin is a reasonable idea, but it's minutes/level instead of hours (not even 10 mins/level!). When you first get it it's a mere +1 to AC (+2 if you have magical knack) that doesn't stack with existing magic armor (which you should have by level 7). At hours per level it would at least make enemy anti-Paladins slightly more durable (If he has a shield and cast it twice that's +4 AC without giving the party loot), but at minutes it's useless.