It does need to be necessary hax, is possible to enhance the spell o technique in other aspects. Let's go with an example: there this mage, with two known spells, light blast and fire annihilation, first spell consume less mana than the second one, and fire annihilation is way more destructive and harmful; one day the mage is hunting a target in a populated area, refuses to use the fire spell (as is going to kill innocents) and instead plans to use an altered light spell, spending additional mana to increase its speed and range, to being able to control it remotely and to share his sense with it, at the end, the new mana cost of that altered light blast will surpass the fire one. Does the damage of the light blasts increases even if is cost srpasses of the fire one?