The Armoury is designed to be customisable so please use this as a starting point to build your own database of questions/answers for challenges.
It is best to have the Attack, Defence and Utility Card challenges be on different Bible subjects.
Focus the Attack Questions on Bible Doctrine (knowing God's word), Defence Questions on applying the passage (apologetics) and Utility Questions on the historical context of the passage (background information).
Seek to challenge players and encourage Bible learning. Repetition can be helpful so don't feel like you need to ask unique questions every time.