This article is from the Final-Fantasy and other Square Soft Games FAQ, by email@example.com (Nick Zitzmann) with numerous contributions by others.
You need to prevent her cure spells from hitting herself. The best way
to do this is to cast Reflect on her, then just keep fighting to take
Original version: This battle is a little tougher than in the easytype
version, since Asura's opening spell is always "Armor," so it'll take a
little longer to win.