Dark Elf 2500 point list

I'm considering investing in a Dark Elf list and trolling for ideas; if you had to build a DE list for 8th ed, what would you consider the 'must-haves' for a tourney build?

I'm assuming dual-hydra and 2-3 units of 10/12 xbows. Are the black guard still the ideal and do you run them horde? I've always seen witch elves just get chewed up too quickly to get their points back; anyone seen different? Is going with a dreadlord on a dragon just asking for him to get shot down in the early game?

Appreciate any and all insight - thanks!