After thinking some more I believe I found a breakdown that seems to match what I'd expect to warp and what I would not. I will just copy it from the other post, but it has different implications here and there, mostly because there I'm not actually concerned with warping.
Targets: Individuals, Rooms, Groups, Boundaries, etc. Eg. A Pilum of Fire, a person targeted by Wound that Weeps, a sword upon which Edge of the Razor is cast, things protected by an Individual ward, the actual boundary of a boundary spell.
1st degree targets: targets directly derived from Targets and affected by the spell, or things on which the Target relies for it's existence. Eg. People in a group, the individual to which a Part belongs, a sword upon which Blade of Virulent Flame is cast, things inside a Circle.
Targets and 1st degree targets suffer warping.
2nd degree targets: things wich are only tangencially affected by the spell. Eg. A person targeted by a Pilum, people attacked by swords enchanted with Edge of the Razor or Blade of Virulent Flame, things moving through a Hermes Portal, a thing bitten by a person transformed into a wolf, something gazed upon by someone with an Intellego Vision spell, things against which wards ward, things hit by an animated tree.
2nd degree targets do not suffer warping.
There are likely to exist a few corner cases (and a few examples might end up moved around after I think a bit more), but I think this pretty much sums up my opinion in a (seemingly, mostly) logical, self-consistent way.
Things which are Targets by themelves? Warp. Things that are intrinsically linked to a Target? Warp. Things that are only incidentally targeted by the effect (the BoAF could have been cast upon anyone, the Mutoed person could have attacked anything, the Intellego sense could have been brought upon anyone)? No warp.