I put off getting the fragments for a long time because I thought it would be very time consuming, but it really wasn't. The longest parts were the raid (of course) and for me tier 2 court of oryx (couldn't get the ones I needed to pop up and then ran out of stolen runes). If you are looking for them without the help of a guide then ya it will take you a long time, but with the help of a guide you could get most in about an hour.