Sometimes characters desire to cast spells or create effects that should be easy and require little risk or effort from the mage.
Often these spells are effects that the mage creates on a regular basis, and the risk of failure is small and has little to no impact on the drama of the story. Determining spell factor penalties and Yantra bonuses for these kinds of spells is cumbersome.
In these cases, just have players roll Gnosis + Arcanum.
Success on the roll equals a successful casting.
If the player wanted to affect multiple subjects, or create a large effect with the spellcasting, then the number of success may determine the number of subjects or the size of an area affected by the spell effect.
For example, if a mage wanted to revive all the dead roses in a garden, she could roll Gnosis + Life and each success would equal a 5 meter radius of revived roses.