I'm considering different paths to completing my multi-engine commercial add-on, CFII, and MEI. One option that I am considering is completing my multi commercial add-on, then do my CFII training in a multi-engine as well as my MEI training to get my 15 hours multi PIC before doing my MEI checkride. My question is, can I take my CFII checkride first without being an MEI, or will I need to be an MEI in order to do the CFII checkride in a multi-engine airplane? Part 61 only states that you have to have an aircraft category and class rating on your commercial or ATP certificate for the instructor rating being sought. I would have my multi-engine commercial complete at that time, so the way I interpret the regulation is that I can, but I've seen a lot of conflicting discussions online about this. I will not be doing any instruction between the time I complete my CFII and MEI; just doing the checkrides. Thanks for your help.