The place to ask all rules questions related to MECCG.
I think that any action (including modifiers to prowess, strikes) caused by passive condition which is a facing AA is declared when the AA is being faced.
Modifiers from Pass the Doors of Dol Gudlur or Redoubled Force are not active constantly. Redoubled Force may be discarded by Marvels Told before its action (+3 strikes, +2 prowess) will resolve.
Tidings of Bold Spies copies automatic-attacks including modifications but the modifications must be already applied to the AAs.
That may be e.g. a modifiers from Arouse Minions.
We will not speak of such things even in the morning of the Shire.