Ranger-ing? Boromir’s gear seems more suited to open field warfare than tracking and guerilla fighting in a forest. It’s literally impossible for a handful of warriors to stop an army, but it’s still a crucial job to scout, harass and delay them. Now it’s possible that Boromir had the skills for that, but Faramir proved that he was both a capable ranger, more traditional fighter and commander at Osgiliath. And IIRC he was somewhat better at resisting the ring, too.