saved post in Clerics -> Developer's Corner - Clerics ... saving for later
Because Clerics and Empaths receive enhanced damage against disabled creatures when utilizing their non-bolt attacks. In the case of Blind (311), you would receive a bonus for the target being stunned and a separate bonus for the target being prone.
Bane/Smite (302), Fervent Reproach (312), Divine Fury (317), and Bone Shatter (1106) have had this benefit since the conversion to GemStone IV. GameMaster Uliq announced it before the migration.