It depends ....
Phys could go first if it carries myth HP plates. With myth HP plates, you could place the high energy and heat modules.
Energy is still the most favored since the beginning of the update. With 1600 HP energy can win a phys or heat with 2000 HP very well, if the other does not have any mythical module.
Heat, some weapons don´t consume energy,but they are the weakest now.
In short, it all comes down to whether you have HP mythical plates or not, with 2 or 3 of these solutions many problems. And if you add 3 or 4 OP items you are almost invincible.