Thanee said:
It's clarified in the FAQ. Temporary hit points do not stack.
What you do is stacking them, because you eventually get to use them all, that's stacking, since you gain the added benefit of both spells, which is not allowed.
That is incorrect.
Stacking is using a bonus or advantage from more than one source at the same exact time.
Like the multiple concealment bonuses, you don't get to make more than one concealment roll because you would be doing it twice at the same time.
Also, the FAQ does not clarify it. It merely states that they do not stack.
This is not stacking.
Stacking is adding all of the temporary hit points from multiple sources like from a Body Feeder weapon together so that they are all available at the same time. The FAQ explains what stacking is for a Body Feeder weapon and my explanation here is not stacking as defined in the FAQ.
So, if you have a 10 point Vigor up and a 5 point Aid up, a 30 point Fireball will do 20 points of damage to you. Your 5 point Aid then immediately kicks in.
If you take no more damage in that combat, than the Aid temporary points would not be lost. If they stacked, you would have only taken 15 points of damage.
The definition of stacking is "Combined for a cumulative effect". It is not cumulative here, only the best applies at any point in time.
Further:
"For example, two bless spells don't give twice the benefit of one bless. Both bless spells, however, continue to act simultaneously, and if one ends first, the other continues to operate for the remainder of its duration."
Neither the FAQ nor the RAW disagrees with what I wrote here. If you have an actual rule or FAQ statement that indicates that you lose the temporary hit points from multiple spells, please post it.
But the phrase "stacking" cannot really be used in your argument because stacking is defined as a cummulative effect.
Btw, I don't really care how this works, I am just reading this according to RAW and the FAQ. If you come up with rules that disagree with it, please post them.