[phiwum]

Just to add another detail, the mustard jelly (Old School Monsters) has an Aid-like ability. Whenever it's hit by electrical or kinetic damage, instead it receives that many "temporary hit points".

Now, it seems clear to me that damage comes off those temporary hit points first and so when they dissipate in an hour, a jelly doesn't become all dead if he's suffered more than his ST in damage in the interim.

To be sure, this doesn't directly speak to the issues we've discussed, because one could always say that these temporary hit points are not like the temporary ST granted by Aid. I just thought I'd point out the similarity in this effect and Aid. Whether or not that's really relevant is, I reckon, up to the reader.