"Russian combat forces have been put at 60% according to Russians who were involved and as reported in Russian media. Local farmers etc are mainly used as guards at checkpoint and to talk to the media. The hard fighting is doen by Russian professionals of various types."
I follow that conflict closely and have to disagree, there are many volunteers from all over the world fighting for both sides, also it's far cheaper for Russia to pay some privateer than lose its own trained soldier as the price of training is not low even there.
Russian soldiers in the conflict are mostly for logistics and training domestic troops.