I have one skill book for Tang Bamboo

I want to shove it into a mask, but 'What if the next anniversary is for Samurai?' 'And what if Tang Bamboo is the main weapon for boss fights?' Thinking that, I can't use it. Forget skill books, I can't use any of the resources. If only I knew the anniversary's performance. There's still a whole month left. It's stressful...