Paradox
Imperial Masterpiece
I don't know shit about bonsai so take this with a grain of salt .
If it were mine i would repot into something large. Air layer the top and grow out the 1st and a new leader.View attachment 329217
Most pines will not air layer. P. nigra is one that wont readily air layer.
I think Zushio JWP is one that will but I am not 100% sure.