You should always finish tasks in 1 trip, ideally, unless 1) you're banking drops like hides/bones 2) if you're given a huge amount of a tough task. And it also depends on what slayer master they are using. To answer the original question, yes, it's worth it, because the defence you get from Guthan's is a freebie, alongside it's healing ability. Maybe its only me, but I bank every drop 1k+ i get, so.. I pretty much have to leave the place anyway :lol: Alch them on task. Only ones I bank are Mithril Dragons and Abby Spectres. snap im the same plus black drag hides they am good cash