After a bit of tinkering, I think I found a decent league starting setup: https://pobb.in/krh_i8K0rciF

Opted for Spark of Nova with a slightly higher damage effectiveness and better screen coverage. Swapped Storm call for Wave of Conviction to be my Unleash setup which applies a nice shock every 2.5 seconds and does okay damage on a pseudo 5-link. Also include a trigger wand and fiddled with skill duration so the tornado lasts almost exactly 8 seconds for smoother gameplay and less buttons. Overall happy with the current starter tree. Thanks for all the build advice!