Couldn't find a topic for it, so here's one for reporting missing or poorly named locations.

Name Change:
Jossik's Rellekka slayer cave only tasks => Jossik's Rellekka slayer tasks
Reason: It's easier for beginners to search for "slayer tasks" and have all the slayer masters pop up, this works with other slayer masters already.

Missing locations:
Turael's Barbarian dungeon slayer tasks inside the Barbarian dungeon, near the entrance
Prismatic altar locations
Ghost Captain, the new one that's west of Barbarian village
Herb patches near Canifis