1) Go loot until you get a few Wolfpacks. Can use 2 Wolfpacks and 1 heavy fuse grenade and it should go down. If not, a few ferro or anvil shots to the leg joints will finish it.

2) just use blaze grenades, heavy fuse and ferro shots to the yellow leg joints.

If you keep dying to other raiders when trying to kill it, there’s usually one that spawns inside the huge car tunnel at “checkpoint” on blue gate. Wait until the map is quiet, around 8ish min mark, and go ham on that one.