Setting a little mental preview of how a Fire Controller uses Stamina, we will use Ella Angloma's effort as a prime example since she is working with nearly indestructible ore. Let's say that there is a scale from 1 to 10, this scale determines how much Stamina a fire controller is putting in a blast, be it a short blast or continuous.
A scale originating around 1, can only cause minor damage against Iron Armour for example, in most cases not managing to melt it or burn it into ash. While a scale of 10, can rip the skin off your body and burn your bones after along with most Armour clothing if there was any. Logically, the less one blows, the longer the Stamina will last.
