i won a game in my school it was 750 points i had 3 squads of 10 necrons a lord with destroyer body, phylactery, disruption field and a monolith.
turn one everything moved forward. Lord killed three scouts then charged. lost 2 necron warriors
turn two monolith deepstriked near back of enemy army particle whip destroyed devestator squad, lord killed more scouts and warriors killed a few marines.
turn three monolith destroyed rhino, combat squad and command squad and and a single terminator
turn four 8 man squad o warriors teleported through the monolith and finished off the last tac squad.
all in all i lost 2 necron warriors and my lord lost 1 wound.