Welcome to Librarium Online!
x12 Necron warriors-216pts
x3 Scarab Swarm-36pts
I know it's tiny, but it's gonna grow...soon
BURN THE HERETIC
KILL THE MUTANT
PURGE THE UNCLEAN
Fun thing about army lists is that you can throw together PLANS for what you will be getting, instead of merely using what you have right now. Since you are planning to get new models in the immediate future, you can go out and figure all the models you will have, and include them in your list. Sometimes I make lists for armys that I'm never even going to start, just for fun.
I've probably stated this before, but the Necron Warrior box has always been a pretty cool deal. A full troops slot, as well as a working FA choice (least in small games). For the same price as everyone else gets a single troops choice (or even part of one sometimes)