Ah okay. Well if you get those 20 darkshards all sorted, you'll have two 10 man units as battleline and will be off to the races at games 1000pts and under.
Or, once you have the generals handbook, you might want to see which subfractions you'll want to focus on.
I'm expecting we'll see a beast of chaos/ legions of Nagash type book for the survivors of Azyr, which will bring all the legacy Aelf factions in line.
You can if you want run a corsair army,and take scourge runner chariots and privateers are battleline, but then you're just limited on allies (both points and number of units).
The reaper bolt thrower, being compendium, cannot be taken as an ally, due to its keyword limitations.