If everything is very well balanced, as you say … it´s curious that you play only with 2 phys and 1 energy or eventually with 3 phys.
The essence of the game is fun and the ability to try new constructions. It’s funny that having all the items, like you do, never play with a heat.
Why don´t you try? Sometimes it’s fun to change mechs … play with something different. And if everything is balanced, then, you have the same opportunities with everyone.
Try a heat then!