Many of my games feature a heavy investigation influence.
Gumshoe, being designed for investigation, provides a way of finding clues and manipulating clues that provides for a far more enjoyable experience.
How can I adapt Gumshoe's methodologies for investigation and scenario planning to Ars Magica?
What do I have to look out for?
To elaborate on one of the problems I've found (via a google+ conversation):
The problem is that there's no power ablation in magic that Gumshoe expects of investigative abilities. If a magi has a "completely read your mind" spell, and is good at the spell, they can go and read anyone's mind that they feel like. The system is far more simulationist than gumshoe. I'm just trying to figure out the abstraction level that can translate the investigation skills to a set of skills and powers that ablates away.
I am specifically looking for a local mapping or add-on to provide a way to use Ars Magica characters in Gumshoe investigations in their world; almost a "investigation-mode" toggle with a set of abilities that can be precomputed from the extant character sheets.