honestly, if you are doing slayer and get clues you have to think about what the monster is and how often they drop clues for example if i am doing abberant spectres i'd probly keep the clue till the end of the task but something like hellhounds if i have more then 50 left i'd do the clue, and they give me a break from the task and the don't usually take me more then 20-30 mins to complete, so why not?