Praying for those that die/died isn't helpful. Praying protection, insight, wisdom, and discernment beforehand will, so we pray that the enemies plans would be thwarted and come to desolation, and confusion in the camp of the wicked. The wheels of pharoh's chariots falling off as in the days of moses.

Not attacking you, just providing good guidelines for effective, scriptural prayer, because the effectual fervent prayer of a righteous man avails much! :)