This is a tribute to the second Fantastic Beasts film. Newt Scamander may know some basic spells, but he isn’t particularly quick witted and doesn’t have the reaction times needed to even begin to challenge Kirito’s techniques. Kirito would be able to dash in and end this match before Newt can fire off a single spell. The best spells in the book are meaningless if you can’t hit your target. Kirito wins.