IHL,
I don't think you can say that "single pilot night/IFR op's shouldn't be attempted" ... They are carried out safely and sucsessfully in many places that have suitably experienced / trained & equipped crews.
Nichosh,
We have a check & training program that has us doing one check or another at least every three months. Also type specific sim' training is invaluable. With larger expensive A/C many organisations severely limit the emergency procedures you can practice in the air. Training should target the most dificult op's that your'e likely to encounter.ie: Night op's to "the black hole"
Our crewies are trained and are great help in the front. Hope this helps.
Stay safe.
Scattercat