Sometimes Kuradal will assign you to kill Tzhaar. Instead of killing over 100 TzHaar, you can challenge the Fight Caves and defeat TzTok-Jad, as well as 8 of his level 130 healers. Once you’ve defeated Jad you will be rewarded 25,000 Slayer experience and of course, the Fire cape. Including the 25000 experience for defeating the Jad, completing the fight caves with this assignment will give 45640 slayer experience.
Additionally, those who have completed Lunar Diplomacy can use the spell NPC Contact (67 Magic required). This allows players to instantly contact any Slayer master and request a new assignment, assuming they have the prerequisite combat level to use that master.
Turael and Spria, the Slayer masters in Burthope, can be used by players to avoid undesirable slayer tasks that have not been blocked. Speaking with one of them will allow you to replace your current slayer task with one of theirs (which can usually be completed very quickly). However, this is not recommended because it will reset your slayer task count.