I can't believe just how much I suck at weapon fusion. I've been trying to make a decent Artillery claw for Solo 9.0, but I just absolutely fail at making an even remotely decent one time and time again. Just don't know how to tackle this and how to build up a strategy that will result in a decent weapon of choice.
I think I probably burned through 20-25 weapons while fumbling around with it and trying to get the hang of it.
Overall defense plus 5 with good stars is mostly what you want.
Mine also has shot range plus one, forward dash continuos fire plus 3 I think and heart bonus plus 3