Best way to fight it to lure 2 Hammer wielding Raiders into the Pit (There's of two of them above the Droids). Once the Oggdo's attention is focused into the Raiders, you can open the Chest containing the Poncho. And Wait until the Two Raiders are dead and the Oggdo will trigger a Bug where it will keep jumping around and it won't attack.
Best way to fight it to lure 2 Hammer wielding Raiders into the Pit (There's of two of them above the Droids). Once the Oggdo's attention is focused into the Raiders, you can open the Chest containing the Poncho. And Wait until the Two Raiders are dead and the Oggdo will trigger a Bug where it will keep jumping around and it won't attack.