Talk:Challenge Arena/@comment-27010656-20151101010241/@comment-71.167.5.30-20151102003626

Different units have different AIs when they're in Arena. Basically each type has different criteria to activate the random chance of their BB/SBB activating. Some check if enemy health is over 50%, some check if it's below, others check squad health, etc.

Mich made a blog for this: http://bravefrontierglobal.wikia.com/wiki/User_blog:Mich,_Michele_%26_Kuhla/Arena_AI_for_Units