Halo themed Imp Guard army

[jaqenhgar]

Had some hanging around in the garage, not tried the Allies thing, or fliers, or my Necrons yet so I'm gonna try out all 3 at once! Necrons are a bit limited in the Allies they can take, with Orks and to a lesser extent Chaos Space Marines being possibly the fluffiest choices rather than Tau or...Grey Knights...! How would Grey Knights Ally with Necrons? Not even desperate allies, but allies of convenience!

Tau would go quite nicely with Necrons though...No! must not buy any more models!!