Core book p.113: The box on Targets and size doesn't explicitly state whether extra magnitudes for Size are part of the R/D/T parameters or not. This is problematic for things like Flexible Formulaic Magic, MuVi, Similar Spells, and Aegis of the Hearth. It should be stated explicitly. If they are to be part of Target, there needs to either be a note added to Aegis of the Hearth (p.161) that extra magnitudes for size are allowable or else Durenmar (GotF) and Didyma (TTA) need to be altered.
If Didyma is not altered, it would make sense for at least one of those magi to have Aegis of the Hearth with an extra magnitude for size.
Separately, TTA p.85 has an odd font issue with "including" on the first line below "Covenant Organization." That's typographical rather than a word error, though.