Would add a lot of spice to the PvP side of the game to have player-hosted custom tournaments. You can go as simple or deep with this idea as you want, but it adds value.
Think same concept as LMS hosted tournaments but instead it could be a high-risk no armour melee tournament, or a just for shits dds/whip tournament.
Let people create "tournament kits" e.g. select and save a custom tournament that they can run again and again from their "tournament kit list".
Each tournament kit list will have settings such as: items available to player in bank for equipment/food/potions/runes.
You can take this concept a step further if you feel like making the coding more challenging, and make the settings allow for different arenas, with both multi combat and single combat as available options.
You can take it another step further, and add flower poker hosted tournaments too. There's endless possibilities here.
This could be revolutionary for RSPS and would certainly give streamers more content, users more community-hosted events (which is what this game thrives on). Imagine a 50-person ice barrage in max mage hosted tournament by smoothie for 1M pkp. That would be a fun time Sunday.
Let me know your thoughts.