Kazuyas perfect EWGF has no down input, just f,n,d/f:2 wasnt sure if its 12 or 13 but yeah its 13.
Edit- WS2 is while standing yeah, i think im using the wrong move though as its also his CH D/f+2 which has +13 frames to EWGF them standing, or the juggle flops
You just dash forward with the input for EWGF, ff,n,d/f:2. Same for wavedash, you use the last d/f input of you previous wavedash to initiate the f,n,d/f of the electric.
With kazuya you pretty much just have to work on conditioning your opponent to be fearing you wavedash, once people start to crouch or sidestep your EWGF/Hellsweeps, you can get crouchdash into WS1,2 (twin pistons) or into WS3 which tracks pretty well, otherwise just keep blasting people with mixups, laying on pressure with your close strings, and just EWGF everything else.