why ppl block goraks?? its only 60 or so per task and its done in few minutes.. and black demons are one of the best crimson droppers (in chaos tunnel at least) i personally blocked iron/steels, kalphites, greaters (till 127) scarabites not worth blocking unless you refuse to use a cannon, they are pretty fast slayer xp and good crimson droppers warped terror bird are annoying if you try to kill them one by one.. but using a cannon is adviced here.. you can even break even they drop tons of rune kites and other stackable stuff.. very good xp, no charms though :(