Necrons: 750 points - Just for a special event

[Chadddada]

Will be participating in an event with about 9 other people. We will all be on 2 6'x4' tables at the same time with 750 points. I am trying to decide on what type of list I want to take. I am not yet sure if this is a pure KP scenario or an objective, but I am guessing a combo of both... I should probably make somewhat of a balance list, but crons can be really strong at lower points as well. Here are a couple that I put together, what are your thoughts?

List 1:

-Destroyer lord, warscythe
-5 warriors w/ night scythe
-5 warriors w/ night scythe
-3 wraiths, 1x whip coils
-1 Doomsday ark

List 2:

-Overloard, res orb, staff of light
-Command barge
-5 warriors w/ a night scythe
-20 warriors
-3 wraiths

List 3:

-Destroyer Lord, SM, warscythe
-5 warriors w/ night scythe
-5 warriors w/ night scythe
-5 wraiths, 1 coil
-Annihilation barge

List 4:

-Destroyer Lord, MSS, warscythe
-5 warriors w/ night scythe
-5 warriors w/ night scythe
-Annihilation barge
-Doomsday Ark