They will affect the mana cost even if they don't do anything in the scheme of the spell - you're better off to put them in a shape group so they only affect mana cost when in the active group.
Yup, everyone pretty much said it: I have quit, but then I took a good look at the state of the mod's latest release, and I couldn't leave you all with a mod in that state - I take too much pride in my work. So I decided to do this one last update (which became a two part because I can't estimate time) to leave you all with something much more playable in the end.
And we all thank you for that mithion because no one else could have made this mod other than you! 👍👏👏👏👏👏👏👏👏👏