Not really convinced an EIR rating actually makes sense for helicopters. It would make more sense the other way around: making IFR departures and approaches and then VFR for the cruise (e.g. on top). Especially this time of the year, we frequently encounter inversions which means you can't get in and out of the airport, but otherwise the weather is perfectly flyable. And if the weather is IMC for cruise, it is most likely IMC too at the airport you want to land, since distances flown with a chopper are usually shorter.
In Switzerland there is still a national license for a so-called "cloud breaking procedure" which allows you to do an IFR departure in a single turbine with IFR-like instrumentation, but only without pax and no approaches.