Power is a major theme. Two Lucifers would bring a lot of power into one story, and it can be about who has more power or how they use their power together.
In the world of 'lucifer meets lucifer fanfiction', a common plot could involve a clash of egos. When two such powerful and complex characters meet, there's bound to be conflict. Some stories may also explore a romantic or at least a deeply emotional connection between them, as they are essentially the same being in different forms, and this connection can be both fascinating and disturbing at the same time.
One possible scenario could be that Jason is in a state of shock. He might be thinking about how this injury could affect his role in the mission. He could be worried about letting his friends down, especially since he's always seen as a strong leader. 'I can't believe this happened. How will I be able to fight like this?' he might be thinking as he looks at his injury.
Lucifer can be a good comic depending on your preferences. If you enjoy dark and mythical themes, it's likely to appeal to you. The character development is strong, and the world-building is immersive.