yeah you could do it...just would make an unforgiving Necron list...yes an idea to make the necrons unforgiving...
Lord(either destroyer body or Phase shifter, then something like the phylactery)
10 warriors 180
10 warriors 180
Monolith 235
2 Heavy Destroyers 130
2 Heavy Destroyers 130
That will still give you 25 necrons so you would have to be knocked down to 5, if you deep strike the Monolith it would cause insane damage, then you would have 4 lascannon shots a turn...The lord, if you give him the destroyer body, can run up and shoot off 3 anti-power armour shots a turn...oh and remember that the particle whip is ordnance, so big template
anti armour weapons:
Lord - 3 shots
H. Destroyers - 4 shots
Monolith - one template
you could wipe them out if you are cautious with the HD's and Lord, along with placing the monolith where it needs to go...
You list is great and balanced, I'm just suggesting a little more aggression