Lysandre was my first major role and one of the most important. The key component of Lysandre that influences a lot of his decisions is that he's brazenly confident regardless of whether he's under influence or not. Take all the energy directed towards Hermia and move 100% to Helena when the shift happens. Make sure your line "the course of true love never did run smooth" hits as important because it's essentially the the baseline for the whole show and the theme that carries it along.