[[Feature Request]] Power Bonus - New Options - Soaking Difficulty / Stamina Bonus

[RinVindor]

Is your feature request related to a problem? Please describe.
Yes currently there are abilities that do things like lower the Difficulty for an activity such as Soaking damage or letting you use your Stamina for Soaking Aggravated damage, while this is also from select sources (and I know there isn't support for that currently). You also can't lower the Difficulty from the Powers Bonuses option section.

Describe the solution you'd like
It'd be great to have an option that lets us add lowering the Difficulty for Soaking. As well as a toggle option that lets us add our Stamina or reference other Traits to add as direct sources. Like when a Power says it can add "the dots you have in [x]".

[RinVindor]

Here is an example power.

Typhonic Beast
(Potence •••, Serpentis ••••)
The Setite calls upon the primordial chaos of the Duat,
expressing it through his own flesh. The vampire takes on
the form of the mysterious Typhonic animal.

System: This power requires the expenditure of three
blood points; the transformation takes three turns to
complete. The transformed vampire gains one dot each of
Strength, Dexterity, and Stamina, as well as the benefits
of Potence. The Typhonic form gains the soak benefits
of Skin of the Adder (see V20, p. 210): dropping the soak
difficulty to 5; and the vampire can use her Stamina to
soak aggravated damage from claws and fangs, but not
from fire, sunlight, or magic. The Setite also gains the
venomous bite of Form of the Cobra, doubles her running
speed, and gains +2 dice on all Perception rolls related to
smell or hearing.

The vampire remains in bestial form until the next sunrise,
or until she voluntarily changes back. Clothing and other
small personal items transform along with the vampire.

Lore of Clans pg 69