There is at least one mistake in your stats:
As the physical version of Bunker Shell (Energy) and Magma Blast (Heat) its costs have to be divided into 50% energy and 50% heat and the sum of both would have to equal the energy / heat costs of the others (+1).
So firing costs would be 16 energy + 16 heat as the others cost 31 energy or 31 heat respectively.
P.S.: Rather than altering an existing item completely TS should simply release a new item with such stats that takes that role.
Btw. I do know that this defeats the official purpose to make Armor Annihilator useful - noble purpose…yeah sure…
The real purpose is that those players that have Armor Annihilator want it to change because then they had useful weapons.
Like turning scrap metal into solid gold.
But that ain’t what TS wants with powerful items.
For TS players spending money for those items is the goal.
So if TS ever introduces a physical version of Magma Blast / Bunker Shell then it will be via item portal with extremely low drop rates and afterwards only as rare drops from premium boxes, premium packs or fortune boxes.