Fire acceleration using Chi-Yu ex to turn the bench into a battery. Fire Off distributes energy as needed between Armarouge ex and Entei, and Magma Basin recovers discarded energy to benched pokemon, most of which never need to see the active spot.
This is the deck I play week-to-week, just updated slightly for rotation. I'd appreciate any notes!
Edit 4/2: Removed x2 Switch Cart, x1 Energy Retrieval, x1 Luminous Energy, and x1 Manaphy in order to include +1 Iono, x1 Ciphermaniac's Codebreaking, and x3 Mist Energy.