monster_abilities.lua missing all Fomor abilities causing runtime errors.

I've never really looked at the action messages/events.  What field of inc 0x28 (or is it 0x29?) contains these special characters?

It's not a field in the actual packet. It's a special character code in the string table associated with action packets / action message packets in the .dats.

So in order to figure out what spell/ability the action is for, you have to:

Grab the message ID -> Search the message ID to see what special character codes it requests -> Pull information from the corresponding resource