As a bit of an off-the-wall question, I was wondering if it was possible to link a single spell to two different requirements.
IE:
Spell ID || Required ID
28675 || 28596
28675 || 25211
The ID numbers above are made up, but I'm just wondering if anyone knows if this would work offhand. If not, I'm sure I'll toy with it, but I was wondering if this sort of arrangement was possible without changing or adding additional functionality.