One of the things Alec realized during the fight against the snake was the need for some type of mobility spell. He could practice and get used to Taryeon's Flash Steps since that was a good spell. But he wouldn't be able to bring out even half of the spell's potential power.
Alec didn't know if it was just Flash Steps or if more advanced spells, in general, were the same. But Flash Steps wasn't just about the attribute of the mana poured into the spell formation. It relied on the lightning mana in Taryeon's body.
It bounced off of it like a rubber ball against a rubber wall, giving him more speed and momentum.
Even if he could change the mana he poured into the spell, Alec would still only have the rubber ball. There would be no wall for it to bounce off.
