Rasknitt’s arena can be hard to use your slayer career skill in. Resulting in a diminished ability to fight.
- Go to the arena and press F in various spots. The terrain is uneven or something, preventing it’s use
- Everytime I end up there
this also was happening to me, there are a few other maps with arena areas that do not let you jump as well
Some additional info in a previous thread (now closed) about the same issue: The Skittergate - can't use Leap during Rasknitt boss fight