The Ritual Of the Core
What is the maximum possible TL for this ritual? It's "equivalent to a fifth level neutral spell" so does the 5xSB limit apply? In this case the maximum possible TL would be 35, assuming AUR and INT are both 18. If it doesn't apply, I guess in theory you could get it up to 95, with enough pluses.
I note that this is a lot harder than researching a Lvl V neutral spell, since the base TL is half Arcane Discipline instead of full.