Integrating someone else's Art directly into the Hermetic Arts is, in general, a silly integration. Fundamentally, Fortunam wasn't designed to be cut-and-pasted straight into the Hermetic system. Instead, ask what your player wants to be able to do with the Art in question and see if it can be massaged into working, either within the existing system or with some slight adjustments. I don't see it working directly with Hermetic Techniques.
One thing that Learned Magicians can provide is Insight into breaking the Limit of Arcane Connection.
Season Duration would be highly useful, allowing for long non-ritual effects.
Also, Mythic Alchemy might allow the possibility of permanent Muto effects. Decide with your troupe whether you want to allow something that big, though - it breaks the Limit of Essential Nature.