Green Goblin vs Scarlet Witch (In the early 1970s)
It's a simpler time. Marvel hadn't started their tradition of having company-sweeping storylines constantly intertwining with their solo/team books.
It's after 1970 when an idealistic Wanda Maximoff rejoins the Avengers after losing and regaining her powers for the first time, but before 1973 when an obsessed Norman Osborn impales himself with his own Glider.
Both have severe mental health issues that have yet to show their full potential.
Both end up becoming unique fixtures in the "Events Era" of Marvel we currently find ourselves in, starting around the mid-90s.
But how to they fair against each other in their classic incarnations? Is Wanda experienced enough to get an effective hex out on Norman before he hits her with a pumpkin bomb?