I am currently a ASEL pilot, in process of studying for IR, and will then be proceeding to AMEL. I know that if one holds ASEL & IR, and takes AMEL with instrument maneuvers included in the checkride, at the end I will have IR privileges in both single and multi.
What is the most optimal (time & cost) route to get my ASES? Are there any efficiencies to be had by completing seaplane rating after IR and/or multi? Or if I was to complete ASES before IR, once IR is done, I could exercise IR privileges when operating a seaplane (unlikely scenario, just want to understand the rules). From my understanding, I will, because IR applies to the category of airplane. Is my understanding correct?