Sort RG based on user sliders

There’s a RG with Objectives. Each cell has a slider.
There’s another RG with Solutions. Each Solution is linked to any number of Objectives. Preview here.

What I want to achieve:
The sorting of Solution items in RG should be in descending order based on the SUM of its linked Objectives’ slider score, which should vary based on the current user (everyone can play with the sliders but to store their values they should be logged in).

What logic should I follow? :slight_smile: Thanks so much for your time!