Dreamer84
I think the advice you have been given is sound. Unless you have a twin job lined up you will quickly lose currency on both the twin and IF flying. The Instructor Rating I am pretty sure still includes a Night VFR which will give you some aid tracking experience.
It is hard to advise not knowing you, your skills or personality. When I was instucting students often asked the same question and I would answer according to how I saw them at that time. Depending on your long term goals - I would say instruct for now, and you will know (and this is part of your command experience) when it is time to get the MECIR and move on.
Good luck - I remember finding the Instructing Rating very useful , and the MECIR the best flying ever.