Need help with an endgame build for necro/kin/soul

[Elthenar]

I made this char on a whim and it's turned out to be very potent. With Oppressive Gloom, Bodyguard mode, Necro controls and a single 50 tohit debuff IO in all powers, it makes for a very durable Fulcrum Shift delivery system who can tarpit a lot of mobs for a team.  Aside from the standard stuff like loading Soul Extraction with pet defense/resist IOs and putting Knockback protection in Dark Embrace, I am not really sure how to IO this guy. I haven't even settled on an Alpha as nothing really jumps out.

 

Does anyone else run this combo? I'll take any help I can get