I think it's a much bigger task to fight off hordes of monsters, leading up to a confrontation with a level 702 that can KO you in one hit just because of an accidental prayer switch (or lack of) as opposed to standing in one spot, withdrawing herbs and vials, mixing them, withdrawing seconds, mixing them, then repeating the process. (You can substitute any skill for the latter.) Maybe it's just because I don't have any skill capes but I do have a fire. Who knows.