When you first start,you have five available slots to RuneScape gold block tasks on the Slayer Block List. But once you hit 300 quest points,you unlock a sixth slot,and upon completing the Lumbridge Elite Diary,a seventh slot becomes available. For players planning to dedicate significant time to OSRS,obtaining the Quest Cape should be a key goal,as it provides access to additional quest rewards and unlocks. Diaries also provide valuable benefits and XP boosts,which can significantly aid your Slayer journey.

Assuming you've unlocked all seven slots and are using Duradel or Kuradel (if you've completed the "While Guthix Sleeps" quest),let's dive into the monsters you may want to block in your Slayer journey. Keep in mind that this list isn't ranked but rather highlights some of the worst offenders for XP efficiency.

Hellhounds
Hellhounds are one of the first monsters that highlight a common theme across this list—single-target tasks are less efficient than multi-target ones. To maximize XP per hour,it's better to focus on monsters you can use a cannon or area-of-effect spells like Ice Burst or Ice Barrage on. Hellhounds are relatively slow to kill and drop few valuable items,mostly dropping low-value items such as clues,Ensouled Heads,or the rare Smoldering Stone. Despite their potential for AFK gameplay and the decent drops from their boss,the experience per kill is underwhelming compared to RS gold for sale faster,multi-target alternatives.