Sword of Justice
Arch Winning (36)
My guess is that it'll be his provisional 31 plus another XV, for cover in all positions.
So 4 hookers, 7 props, 6 locks, 9 backrowers (inc 3 Opensides), 4 halfbacks, 3 fly halfs, and an assortment of centers, wings, full backs and utilities totalling 13 players.
Not too different from your guess, just depends how many he's got his eye on in each position.
Haha you were smart and didn't bother putting a number on positions after #10. I think he'll focus on positions that aren't clear, which I think will be squad props out of the 23 and 6 and 8, as well as wingers.