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.

Very few animals (probably none) that rely on venom have any need for killing elephants, including those who live near elephants. What’s a spider supposed to do with a 2 ton carcass?