highest damage spark volt followup i could find for 50% meter (tested on arakune)
spark volt, 5C, 6A, 2C, atomic collider, step forward just a hair, B sledge, folluwp, RC, 5C, heat does 4927.
meterless, it does 4185 (end after the sledge).
is that the best you can do..?
followup does not work on carl (unless im fuckin it up)... :/ but the 4185 damage part does, however. also the 6C 5D followup doesnt work on him after this combo anyway...
edit: the rc followup seems arakune specific, kinda blows. i tested on carl and rachel, neither work. there might be a way to get it to work on rachel but idk.
editx2: also it may seem like a "bad idea" to forgoe the 6C 5D followup, but you still get 2 seconds of magnetism with this combo, and you can still do tech resets off sledge followup, in fact, its almost better in that sense because it a) doesnt knock them full screen b) its a much less commonly seen tech trap.