Based purely on vibes (even if they don't make sense based on magazine attachments, belts, etc.) here are exotic weapons I think should use the heat system, and minor changes in accordance with this: Sweet Business - Adaptive Heat (Payday Perk) : collecting ammo reduces heat level and drastically reduces heat generated for a moderate duration The Huckleberry - Dynamic Heat (Ride the Bull Perk) : final blows reduce a large amount of heat Arbalest - Dynamic Heat (Genesis Catalyst) : breaking a combatant shield immediately resets heat level No Time To Explain - Dynamic Heat (Rewind Again Perk) : precision hits and shots against targets slowed or frozen by stasis reduce heat level Cryosthesia 77k - Dynamic Heat (Cold Efficiency Catalyst) : freezing a target resets heat level Coldheart - Adaptive Heat (Longest Winter Perk) : collecting Ionic Traces reduces heat generation Merciless - Dynamic Heat (Impetus Perk) : venting shortly after a kill increases damage for a moderate duration Symmetry - Adaptive Heat (Dynamic Charge Perk) : swapping to arc seeker mode resets heat and reduces heat generation based on the number of Dynamic Charges. Collective Obligation - Adaptive Heat (Umbral Sustenance Perk) : this weapon's heat level resets when you gain Devour, a Void Overshield, or become Invisible Centrifuse - Dynamic Heat (Overcharge Capacitor Perk) : electrostatic charge reduces vent speed (Regenerative Motion Perk) : sprinting reduces heat level greatly Third Iteration - Dynamic Heat Darci - Dynamic Heat (Target Acquired Perk) : when personal assistant is active, this weapon has much lower heat generation Heir Apparent - Adaptive Heat (Armor of the Colossus Perk) : while at full health or low heat level, spinning up this weapon protects you with an arc shield (Legion's Bulwark Catalyst) : reduces heat level when the arc shield takes damage Deterministic Chaos - Dynamic Heat (Vexadecimal Perk) - releasing the trigger after a Vexadecimal projectile reduces heat level by a large amount