Choose a safe rivalry
Board-game bragging rights, kitchen skills and fantasy-league predictions are fertile ground. They are specific enough to be funny and small enough to keep the stakes low.
Avoid sensitive traits, private history and accusations. If one person would not laugh hearing the topic in front of the group, use a different angle.
Balance the parts
Give each performer one playful claim. The prompt might ask for a call-and-response about who owns the group playlist. That sets up a battle without forcing a winner.
A street stage can add the visual energy, while a studio booth keeps attention on expressions and delivery.
Share with context
Check the result with both people before a public post. A private group chat may be the best home for a joke built around shared memories.