It depends on the opponent for me, mostly i try to balance the two out.
As example: I played a CPU opponent on Vanilla DC five minutes ago, on hard, against Necrons (Random choice) and got spammed with Wraiths within 3 minutes. I lost
I tried again and only built a Chapel Barracks and one Generator. I had them on the run with just two Tactical Squads within three minutes.
Its resource/unit production rate and point capture rate is simply too Slow for me. I should probably play it more often.