Do you hold seperate ratings, or do you have a FI rating with Instrument and ME privileges? Normally IRI and CRI are stand alone ratings.
You can renew you FI on any Class you are qualified to instruct on. An FI revalidation flight combined with either experience or a FI seminar will renew all your FI privileges in one go. If you hold a stand alone CRI rating, your Authority may have other ideas regarding that.