Are you aware of how a solidifier works? Sure you make a heat stone and it gives you 3 casts, but it will take those three casts just to make another stone. So tell me Miq how are you making 3 new heat stones with only 3 heat casts.
To make just 1 heat stone you need 12k heat, and 1 heat casts gives 4k heat.
The math doesnt add up. Do it again