Regular IFR training is a good idea, but it's not really practical. A safety pilot is required when flying with vision limiting devices, and most common EMS helicopters are configured without a copilot's seat. In order to do IFR training, a mechanic has to remove the stretcher and install a seat and all the controls, then replace all that when the training is complete. It requires putting the aircraft out of service for almost an entire day just to do an hour of training. It's either that, or having a spare aircraft devoted just to that training, floating around the company. Then you have to find a spare pilot to fly along, which is really the easy part. Convincing the bean counters to allow this regularly is hopeless.