Slayer

[Pro Noob]

I would like to gather some ideas for slayer that you guys wish to see.
Slayer helm is no need to suggest as I have plans on bringing it in.

I have the idea to add some unlocks from slayer with coins as a purchase currency. Such as noteable herbs while on a task or double the amount of herblore supplies. Other things is having a random chance to spawn a superiour slayer monster from the task (combat variante of this is based on the current task you attacking, the higher combat the higher superior monster's combat).

Do note nothing is set in stone and this thread is all about gathering ideas so we can poll.