A. Do you have 195 aspd? Try it with 195 ASPD and see where u go.
B. High Wizard spells are already powerful no need to boost them.
C. This was suggested before and it was rejected i think.
D. Increase maybe the SC Damage but nothing more. There's also a thread for suggesting new effect to existing Valkyrie weapons (Valkyrie Suggestion Thread). u can try to suggest and see where it will take ya.