I used the DA rear trailing arm (complete) but stuck with ED shocks and springs. The DA shocks and springs will make the car sit up much higher at the rear due to the spring rates of the DA coils. On the front I used the DA knuckle and upright but, again, stayed with the ED shock and spring set. You can use the DA and you can also use the EG/DC but you have to use the EG fork, as that is the main difference between the groups (the shape of the fork). You could experiment with mix and match shocks but just remember when they are manufactured the springs are made at different spring rates to cater for the weight of the specific vehicle.
Peter