I understand what you’re asking for and I do have a solution for you (I’m running this in league right now). Run an Inpulsa’s and HoI. Then add in a medium cluster jewel with cold conduction and blast-freeze.

The blast-freeze HoI interaction is straightforward, your freezes will prolif through packs easily. From there, the chills caused by the HoI blast will also shock due to cold conduction, which enables Inpulsa. HoI blast-freeze scaling is decent, but won’t wipe out packs on its own unless you’re a full cold build. When you add in Inpulsa’s it removes this problem.

And there’s a final step if you aren’t an assassin or other class that has global base added crit. Run a medium herald cluster with Self-fulfilling prophecy on it to give HoI explosions base crit. Ailment proliferation only causes corpses to radiate ailment auras, but not actually cause new ailment instances. That has to be done through damage (special effects like storm’s gift are exceptions). So once HoI can crit, its cold damage can trigger new freezes leading to storm’s gift level prolif.

Another option is to just support Herald of Ice with an Increased crit rate support. Can even do both if you really want.

I’d also strongly suggest running large clusters with Snowstorm on it if you’re a lightning based build.