Another note on spiritual warriors (if it has not been stated already): I'm not sure about all of them, but the armadyl warriors are incredibly weak. you have to kill them with range or magic, as they are flying, but they will almost never hit you. From memory, I didn't need to eat at all on my last task, but I honestly can't remember. You need lvl 70 range, mith+ crossbow and mith grapple.