Astorath or Lemartes?

Brothers, I have my first game using the new codex coming up and I'm struggling to decide on a list.

Using the Liberator Assault Group detachment which of the following would you recommend running?

Astorath + 10 Jump Death Company Lemartes + 10 Jump Death Company Astorath & Lemartes + 5 Jump Death Company each

Will be playing against a Dark Angels Deathwing Army. Any help/advice is greatly appreciated.