I’ve played Wild Heist once. My 3 picks were 3 extra spins, +1 wild and another +1 wild. No re-picks, and it still went for 140x.
Best starting set-up is probably 3 extra spins, +1 wild and the golden ticket. Best golden ticket would be walking wilds because they stop the free spins like they do in Jack and the Beanstalk and it can then go on for ages. If it re-picks, then the best pick would be a multiplier.