Observation - It seems as though the depths leading up to the Jelly King offer a disproportionately large quantity of heat relative to tier 3 content. Even compared to the depths leading up to Vanaduke, the Jelly King runs take far less time and offer far more heat.
Suggestion - heat quantities that correlate more closely to depth.
Boss Stratums always give more Heat than everything else. The issue lies with relative difficulty; I get what you're saying, but it seems superfluous.