@moorebrother1 I'll usually Hurkyl's on the opponent's end step, unless of course they're swinging for lethal. I very much dislike casting Hurkyl pre-end step because they usually just re-deploy everything.
If I'm playing a deck with a white splash (or heavy white,) I'll sideboard out all of my missteps and flusters. I'll side in Swords to Plowshares and Disenchants, and I'll bring in any extra Hurkyl's. I also like Energy Flux, but it sometimes feels a bit slow and sometimes it misses the mark (they have enough mana to pay for creatures when presenting lethal, etc.)