i've had several demon/ele bows, and on catskills its hard to even get 10mil for them
they are useless imo.
i tried using one on my archer, and you're much better off just using a good bow that will get you high damage, speed, leeches, hld etc then using a 3x slayer. the demon/ele bow is so slow you have to gimp out in full dex, and it'll just hurt you to use it.