What power up would you give to Wakatsuki to make him more interesting to watch?

This isn't really about what's best for him but what can make him look cooler or more intriguing in fights

He is already a cool character to watch but I think he is kinda lacking a bit of spice ya know

Like I want another technique other than Blastcore, Blastcore can be very hype but a lot of times it just fails and sometimes it feels like he does it too much