Total time is an indicator but no more than that and it needs looking at in context with what that time consists of, 1000 hours of RHS in an airline will not qualify you to operate single crew bush flying.
I would suggest that the 1000 hours single engine is good for most types of flying, in that time the guy would have probably have had to operate in !!!!ty wx, into difficult strips with few aids and done a lot of thinking on his feet. Having said that, a couple of hundred hours multi time would help.