Back in the late 80s, my first band was Drastic Action. Our vocalist/guitarist left all the lead work to the keys, except for Show Me the Way and like a Hurricane where I got to go completely off-piste. I used to play a mix of the vocal line (with flourish) and then scales based stuff over each chord untill it got silly. I recall I typically had an HM2, a Mini-Phaser, a chorus pedal and god knows what else all mashing my sound.