As Sir Nicholas gives priority to A2 and not A3, I can't make my unk cb team. It doesn't work because with books he upgraded a2 to 5 before a3 to 3 (I'm extremely unlucky), so it's totally useless now.
There should be a way to reset  (without books back obviously).  
i cant think i have to throw away the only void hero i have found for almost 2 years i play