Noel and Taokaka, I'm finding, are the 2 characters where the electric chair works really well. Haven't had too many problems with them after starting to use the chair more liberally.
Jin on the other hand...I can't seem to get out of surfboard spams too easily...i think 6B takes priority, but I haven't been able to time it properly more than 2-3 times (all accidental).. :/