I hate Jagex's idea of Slayer. They give you a million horrible tasks that take forever to complete one after the other. I've been on a loop of black demon, black demon, greater demon, black dragon, hellhound. I wish Jagex would bring out a bunch of 70-110 cmb monsters for slayer, put them in a dungeon, place a multicombat sign and then slap about 200 of the monsters in the place so there is less competition.