Complex sentence: Faol felt that the contribution to the war effort by pure clerics during the First Great War (') would not be sufficient for the battles ahead, and decided to create a more versatile cleric that didn't need protection in combat.
Split into simpler sentences: Faol felt that the contribution to the war effort by pure clerics during the First Great War (') would not be sufficient for the battles ahead. Faol decided to create a more versatile cleric that didn't need protection in combat.