Starheart? You mean Alan? Because his power is derived from the Starheart (something about a GL shard that he internalized...it's all a bit fuzzy to me).
If that's the case, decent fight. Alan has the will power to shrug off mental intrusion, and could probably provide a nice fight for Doc Strange. Strange has more tricks up his sleeve, but both have displayed Skyfather-esque power at times (even though they're both usually below that level). Can't decide a winner...
No not Alan. The Empire of Tears/Starheart.
THE STARHEART / THE EMPIRE OF TEARS
When the Guardians first decided to dedicate themselves to protecting the universe, their greatest foes were the monstrous Empire of Tears, a group of evil sorcerors and magic users whose influence spanned two galaxies. In an epic war that lasted thousands of years, the Guardians finally defeated the Empire of Tears and imprisoned them within the very soil of their throneworld, Ysmault. The Guardians then sealed all their enemy's magic into a mystic orb they called The Starheart and sent it into an endless orbit of the universe. Unfortunately, all that magic merged and acheived a form of sentience. The Starheart managed to split off a fragment of itself into a green meteorite that later collided with a dying GL named Yulan Gur. This Starheart fragment eventually became the lantern that empowered Alan Scott.