I always preferred am injections before a shower, and I always workout early afternoon, though I have never heard that there is a bad time while cycling. Creatine may help (5gms after each workout) your training because of increased ATP production, but DHEA (deemed the mother hormone) is not necessary because it primarily helps the rest of your hormones work properly, which due to the gear your body won't be producing because of negative feedback.

Be careful, and very safe. Do your homework before starting any cycle.