Device      Dmg/RF      Dmg/RF          Notes
TC:         6/512=      0.01171875      (Does not include idle power draw)
Razor wire: 2/64=       0.03125         (More efficient if shocking multiple entities at once, shock damage only)
HV shocks:  15/4096=    0.003662109375  (max. 7.4 hearts per shock, but low efficiency)
MV shocks:  5/1024=     0.0048828125    (max. 2.5 hearts per shock)
LV shocks:  2/256=      0.0078125       (max. 1 heart per shock)