Everything

In all cases, the mage must first successfully perform the Effect – using her typical focus – before the difficulty can be reduced. And so, the speed at which the mage can spot that opportunity will depend a lot on what she needs to do in order to use that magick. A faith-practicing mage could speak a brief prayer to her patron deity before she acts, while a temporal technician needs to feed data into her computer and run a program before the correct moment becomes obvious to her.

Because it would require casting two magickal Effects at once, the Perfect Moment feat CANNOT be used to lower the difficulty of spellcasting Arete rolls – ONLY for the timing of mundane activities. It may, however, be used to lower the difficulty of a ritual if and when the feat gets used to prepare the rite ahead of time. (See