I'm wondering if anyone has compiled a list of the spells that have been added in various mods - in particular, the filenames & numbers used (I've a feeling there isn't - at least, I haven't found one yet)?
On a related topic, I believe that there is a system where mod-writers can use dedicated prefixes in their filenames, (unfortunately, I think the list of these prefixes is on TeamBG) - but I'm not sure this applies to spells.
As you may have guessed, I've decided to start modding by doing some spells (as this looks to be relatively simple - at least for some of them

Yours,
Charles