Slayer is one of the slowest skills in the grindy Old School RuneScape. You can however become a little more efficient at it in a few ways. First, using fewer consumables along with killing certain good money-making slayer monsters will make you more efficient by giving you XP, besides gold.
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Secondly, saving inventory space means less loot left on the ground and more loot taken back to the bank in fewer trips. Getting additional or faster experience is also handy as it translates to more XP per hour, taking you closer to the 99s, or your next level goal. In short, these items are a must-have because they will make your slayer life a bit or a lot easier.
The Ash Sanctifier will help you get passive prayer XP similar to the Bonecrusher. You can claim it from Tyss once you have completed the Kourend and Kebos hard diary. The Ash Sanctifier needs to be charged with death runes to scatter the ashes, and for each death rune you use, you'll get ten charges. It will give you 50 percent of the XP you'd normally get from scattering the ashes with the hard diary, and 100 percent XP with the elite Kourend diary.
This slayer must-have item is designed to speed up the tasks you dislike by giving you a 25 percent chance that a monster you kill counts as two, so you should use it on the tasks you hate the most. It has 30 charges and one will get consumed each time the bracelet activates, so you only need to wear it when the slayer monster dies. You can create the Expeditious Bracelet by using LVL-1 enchant on an opal bracelet or by buying it from the Grand Exchange.
To get the Soul Bearer you have to complete the miniquest Bear Your Soul which you can start by reading
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