Hello, something feels strange with this combo and I wonder if it's a bug.
With Thermodynamicity, thermodynamic Destabilization count as a cold ability for the reduction of its own AP, but the next abilities which have reduced AP are also cold ones when you use thermodynamic Destabilization . That means the combo to get reduced AP is cold->cold, and it should be either cold->fire or fire-cold, so thermodynamic Destabilization should either count as a cold ability and gain AP reduction after a fire ability was used and reduce the AP cost of fire ability, or either count as a fire ability, gets AP reduction after a cold ability is used and reduce the cost of the next cold ability.