You can contact (internet or call) Semex, ABS, Select Sires and Genex and they will tell you what the recommend. I am new at AI, but know a lot of producers who told me how to set up my program. I gave them a shot of GNRH and inserted the CIDR. 7 days later pulled the CIDR and gave a shot of lute. At the 55 hour mark my technician AI'ed and gave a GNRH shot.
Hope this helps. There are a lot of good producers on here that will have had success doing it differently.