my $0.02 on the choices:
Kvothe - eh, too old and not charismatic enough… I think Logan Lerman with dyed red hair would be better: (the kid from three musketeers). He might be too short though.
Manet - I love chris o’dowd, but I think of Manet as someone older.
Denna - There are better, younger choices out there.
Kilvin - What were you thinking? Get some gruff scottish tank.
Lorren - Good choice.
Bast, Ambrose, Devi, Elodin - 100% Perfect choices.