For her aging roll the first year she has -11 from her ritual, -2 from her bronze cord -2 from her living conditions and -1 from her lab for the first year at 102 years old so 1 year at -5
then she gets the new longevity ritual at -29 so she gets 8 years at -23
and then 6 years at -22.
She'll end at 116 years old and take one year of apparent aging so she now looks 44
With Andreva's time with her apprentice and the lab periods when she didn't need Grace's help, Grace has 16 seasons unaccounted for. I'll say she spent 4 with the apprentice and I'll give her another 60 xp for the remaining 12. Here's how she'll spend it
Teaching 2 (apprentices) for 15
Magic lore to 3 for 15
Infernal lore to 3 for 15
Faerie lore to 3 for 15