I'm in a similar situation.
I have to do LPC MEP each year. LPC SEP every two years (if I have less than the approved number of hours in a single)
My single crew IR is done on a twin which gets a separate line on the licence :SPA ME IR, valid for a year. If you do it on a twin then that allows you to use the priviledge of an IR in a single if you're feeling brave! It makes 4 visits to the sim for a 737 seem simple!