Just unlocked Shiradi Champion the other day and I've been testing it out. So far, I don't know if I've just been unlucky but I've never been able to accumulate fey favor on spells even once. The text says that it can be gained by either
a) rolling a 20 on any of your ranged/thrown attacks. Or...
b) 7% of the time when casting offensive spells.
So far I've tried casting rune arm spells (toven's hammer and force shot), tactical detonation, and prismatic strike and NON of them have landed me even one level of fey favor. I haven't tested wands, scrolls or other offensive spells but so far it seems like non of the spells available to my artificer are landing any fey favor.
Is anyone else seeing this?