Ah, Da Vinci, MHXA, Lobo, Kiara, Saber Fran, Archer Anne and Mary and Helena need them for skills while while a good number of SR needs it for ascension. Actually a bit surprised that no SSR seem to need it Ascension wise though.
Infact, Angra requires the most tars needing 10 compared to everyone else at 8 and 6.