I've been yeah, got Shakespeare and my girl Mata Hari their new skills and just got Carmilla's hers as well though I lack the gems to improve it right now.
That said, who all is in this Strengthening batch?
Also I've...maxed a surprising number of servants below 4-star, like...I'm surprised how much fun I have using them honestly that it almost makes me wish I had more grails to get their stats closer to up to to snuff with a four stars and such.