Try this set up: Torag plate and legs, berzerker helm, obby shield, whip, obby cape, rune boots. You probably will not be able to do the entire assignment without banking so take several antipoisons, supers last the longest, and a few stat increasing pots if you have them and some good food. When your antis run out, you can go back to workers if you are close to finishing your assignment. You are correct in saying they are great slayer experience, so good luck. Oh, and if you have Guthans it is really good armour to have here :D