[Gnomasz]

I'd say "no".
Judging by the guessed spirit of the rule, see the example on the same page: Fergus can invest up to 6 energy points per second, and no discount is mentioned, even though he's got skill 17.
Judging by RAW, the discount is applied to the cost of a spell, while the perk doesn't mention paid cost, but rather the invested energy, so the rules don't interact with each other.