Valk speed that isn't another Valk? Neutron Axiom Insanity
Pretty much any of the 10 speeds from stable to US will fill whatever flavor valk you want.
Interia/insanity = champ/star like valks.
I am currently throwing an MVP octane which is flying like a 12-13 speed inertia. Pretty much dropped the faster 7/10 speed US stuff for the relay. Like you just said above that damn disc goes boom.