So I got an abyssal demons task today and I decided to try out something I have been thinking for some time already: demon slayer equipment (top/legs/boots/gloves). And I'm quite satisfied with it. The armour gives both an 4% damage boots per piece and an extra 2% combat xp boost per piece. I didn't use a demon familiar because I didn't want to make a very serious test anyway (my fps drops far too much when fighting abby demons on slayer tower - I presume it's because of their constant tele'ing, in conjunction with 3rd world connection and computer), and still I got 900 kills/h easily. I'm sure close to 950 should be possible. And when adding the bonus combat xp on that it makes range even better than mage there.
12-Nov-2015 16:52:58