Apparently you have not read the previous posts. You don't need a valid MEIR to apply for a job nor start a type rating. This has changed in 2019. Of course an employer is free to require it anyway.
If you choose not to revalidate IRSE or IRME, beware you'll have to do all the ATPL theory again if they have lapsed for more than 7 years. Therefore you should renew any IR privileges every 7 years to keep the benefits of your theoretical ATPL.