Clarification needed: Tempest Bell × Frozen Wall scaling

I’m trying to understand how Tempest Bell interacts with Frozen Wall, specifically in terms of damage scaling.

From what I’ve observed, the interaction works, but the resulting damage is difficult to predict or scale consistently. I’m not entirely sure which modifiers are actually being applied, or whether the damage is coming from Tempest Bell, Frozen Wall, or a secondary interaction between the two.

Has anyone tested this interaction in detail, or can clarify which stats meaningfully affect it? Any insight into how you’re scaling this would be appreciated.

I’ve included a short clip showing the Tempest Bell–Frozen Wall interaction in practice.
https://youtu.be/B8gyOZZqgx0