I believe the Naofumi's skills in cooking, and medicine just come from him leveling up those specific skills if there are any examples you'd like to show me to prove otherwise that would be fine. I do know the shield allows him to negate things like debuffs on motion sickness and the like. I'm not sure how exactly you want me to point out how things work for the shield by using Cole as an example. Cole's methods would be purely offensive in nature the exact opposite of yours. If you want just general ideas. Things like Shield soak, bathing an ally in water to douse fire, or Earth Wall to conjure a pure wall of earth in front of you ala Edward Elric are two things that come to mind.