I am confused now!
Take it easy = Calm down /or/ something like: goodbye and take care of yourself.
Help yourself = take some
For example: I made these cakes for you, help yourself. Once you are a premium member new worksheets are free, help yourself.
I �m not sure what "May it be easy" would mean either. Maybe before someone is doing a test and you say: I hope it �s easy!
Other than that I can �t think of any other time someone might say that.
I think this might be one of those bad translations that got repeated and repeated.
My students are forever saying: "Have a nice time!" When they mean "Have a nice week/day/etc." Because some silly book somewhere once translated "Mej se pekny" as "Have a nice time"