Terra comment about this is simple. Paper is not always condusive to all outcomes. EM look good n beginning,b ut comparably,a nd considering more enemies towards end game have alot of energy resistance, EM not exactly as great as it sounds. Furthermore, damage wise, as an SS, Terra tend to come out ontop. Footstomp might seemt o take longer as an AE, but have much wider range, and do alot more damage than whirling fist.
PvP potential for EM there, but thena gian, depend on sets. Alot of energy resistant sets out there. Fought an energy brute today in Warburg. Dunno why, but guess just felt like attacking me. His 120 point total focus versus my 175 point ko blow makes total difference.