A temp craftable using 50 or 100 frozen shards and some other materials that works on a trigger instead of a timer (like how the Ascendant Badge works)
Frozen Catalyst:
The next time you play Ascending Heights, the chest at the top will have it's Souls reward increased by a percentage of your total spent Slayer Points.
The idea is the minigame becomes a lot less rewarding the further you are. While Bonus Stage gives you bonus boxes (which always remain relevant), Ascending Height's rewards really drop off. I
I like the minigame so would love to see it become relevent in endgame instead of dropping off. Bonus stage does it with it's Bonus Boxes. Chest Hunt does it by scaling with Souls Gained from enemies available to kill in the realm you're currently in. Hope this idea is a good starting point for Ascending Heights.