Complex sentence: When the attack came, Roy and the rest of the Order quickly dealt with several elementals summoned by Redcloak and launched at the battlements, and then saved Elan's life from a hail of arrows.
Split into simpler sentences: When the attack came, Roy and the rest of the Order quickly dealt with several elementals summoned by Redcloak and launched at the battlements. Roy then saved Elan's life from a hail of arrows.