Aromatherapy advice?

I started looking into essential oils for aromatherapy recently. I’ve been loving peppermint to help ease migraines, and have used lavender for relaxation at times. But I’m wondering what some of your favorites are? 

I would love to know a blend for good dreams. My oldest son and I are both stress dreamers. A little stress and we have vivid nightmares. I started started using lavender for him but wonder if there may be something more effective. Let me know if you have recommendations for dreams, or anything else you’ve used essential oils for. I can’t wait to try y’alls recommendations!