Binah is a raid boss in Blue Archive that can be encountered in both normal Raids and the newer Elimination Raid mode. This page describes Elimination Raid version, for normal Raid boss see Binah.
The fight is generally the same as normal Raid version and consists of three stages that are advanced upon reaching certain HP thresholds. Whenever Binah takes damage of a type it's weak to, the stun gauge will rise. When the stun gauge is at max, Binah will get stunned for a few seconds and use his Purifying Storm move if you are on the 3rd phase.
Since characters are not locked out between variants of the boss, Himari and Ako remain the default Special students choice for all fights.
Ako
Akane
Akane's EX skill works just as well regardless of boss armor type, which makes her an easy pick for every team at difficulties up to Insane.
Maki
Maki won't deal significant damage to off-color versions of the boss, but her valuable Normal skill Defense reduction means she can still be used in a support role.