"Top Four CSL Teams Face Off in FA Cup Joint Event: A Celebration of Dominance"

This concise title encapsulates the key elements of the event:

1. It mentions the top four CSL teams advancing to the FA Cup.

2. It indicates that these teams will face each other in a joint event.

3. The term "Celebration of Dominance" suggests the high level of competitiveness expected from the teams.

This title should be easy for readers to understand and capture their interest, making it suitable for an article about the upcoming event.