Just 1 pray UIM things #2. Off-task Dust Devils for Dust runes

Combination runes don't occur naturally through slayer on a 1 pray uim. The largest hindrance is that dust devils won't be assigned by any slayer master at lvl 1 prayer. But combination runes are very useful to save an invent slot on many skills. I camp them off-task with this method.
Dust staff is very useful for skilling- if you can get one. The only superiors you'll be assigned on a 1 def 1 prayer UIM are Kurask Superiors (Fremenik Dungeon) and Jelly Superiors (Kourend Dungeon). It is impossible for me to be assigned bloodvelds, gargoyles, nechryael or abyssal demons. Dark beasts and Smoke devil tasks (and their superiors) can be unlocked by asking slayer master to ignore combat level whilst giving a task. Not advisable.
i like to kill dust devils until a stack of 5-10k dust runes. A dust staff is 1/4k from dust devils and once youve got it you could stop. However pre-99construction the runes can be more useful than staff, by storing in pouch.