So endurance looks pretty bad on both builds - the 2nd build looks rough even with Cardiac (which also grants more resist.) I can't imagine using attacks a ton with so much recharge because of the endurance drain running all that. Recharge on a necro/sonic doesn't seem like it should be a priority. Would it be better to just dump all the protection procs on Soul Extraction? I've seen that done on Thugs/Demons and so on.
Combat Jumping, Disruption Field, Sonic Dispersion, Maneuvers, Tactics, Sonic Repulsion, Dark Embrace, and the Hasten end drain is a lot. Then again I've argued the MM end penalties really don't make sense in real play. This sounds like a fun combo and it's different which I like - but it doesn't seem sustainable at least not in the 2nd build here.