i use the precogs to stall when needed, but for the most part their main purpose is to draw cards. since there are no towers in the deck, first turn i cannot play anything, but the second turn, if i have a supernova, i will play 2 sundials if i have them, i will play 4 sundials if i have them and if i have 2 supernovas. the actual killing only takes a few turns, and cycling through the deck seems to work better for me over having 6 copies of each card. ive noticed cards bunching up on me far too often