Warhammer 40K Tabletop XXIX: Ro, Ro, Ro Your Boute

[Cheesegear]

-ML2 Librarian with force sword
-Deathwing Command Squad (DW Standard, DW Champion, DW Apothecary, TH/SS x3)
-Ordo Xenos Inquisitor with ML1 (hammerhand), rad grenades and force sword

How do you know your Inquisitor has Hammerhand?

With reference to the mini-list I posted a few posts ago, what would be the best secondary psychic discipline for that bunch? Assuming Ezekiel gets Electrodisplacement, of course. I'm a little unsure about which discipline would be most effective to force multiply there.

Telepathy or Biomancy; Looking for the classics. Iron Arm, Endurance, Shrouding and Invisibility. If your unit doesn't roll Electrodisplacement, you're in for a bad time. But, that's why I'd run a Dark Angels Conclave.