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

[Theodoric]

I saw an old Nemesis Vanguard box at my FLGS and thought about picking it up, use the models in it as allies for my Imperial Guard army, or maybe as a start for another army.

The box contains 1 Land Raider (IIRC without the Crusader/Redeemer sprues), 1 Dreadknight, 1 unit of 5 Terminators/Paladins, and 15 Power-armoured-Grey Knight models.

Any ideas for a roughly 1000-1500 point detachment? I thought about turning the Terminators into a 3-unit Paladin squad and converting the other two models for a Brother-Captain and a Librarian, but maybe that's the wrong way of going at it (Not very familiar with Grey Knights). It doesn't need to be a full army, just something that can support a mixed Imperial Guard army (ie. it has both infantry and support tanks/artillery, but only 1 unit of Ogryns for melee). Chances are they'll mostly be up against Tau, not other Marines or Eldar.