Going to be playing my buddy on Monday and managed to come up with this listing. Random objective game and we'll both mess with map setup. This is what I managed to come up with working with my currently rather small pool of Necron with proxying only a few which he usually doesn't mind as I'm just starting out.
2x Overlord with scythe, scarabs, resorb, weave
2x H. of Destruction with Gaze of Flame (Proxy)
2x H. of Transmog with Crucible (Proxy)
2x H. of Storm with Lightning Field (Proxy)
1x Lord with scythe, scarabs, resorb, weave (Proxy)
16x Warriors
16x Warriors
10x Immortals w/ Tesla
5x Scarabs
2x Destroyers
1x Annihilation Barge w/Tesla
TOTAL UNITS - 59
The idea is to make charging a bitch for him. He loves to engage my Necron with their I2 and beat them up. He recently picked up Blood Angels so I'm sure I'll be getting charged at by some Death Company at some point. I want to make that inevitability very painful and potentially game changing for him. Scarabs will go vehicle hunting and if they can't get to their target quick enough they will run a screen. Barge does its dakka while slowly advancing as well. Note that this is literally all I own for units aside from a Destroyer Lord. I'll probably use some specific Eldar to represent each of the Harbingers as they're rather distinctive.
My other option would be to split my 32 Warriors into a blob of 20 and two groups of 6 and drop an Overlord and put my
DLord in. I'll see how this works first though.