All of that being said, ask any experienced CFII, freight dog or alaska pilot how they feel about flying a single in WX that is at or near minimums. They'll tell you it is done all the time.
I'm not certain who the "they" in that statement is, but I sorta suspect I'm one of them, and I don't agree with flying single engine instruments at all. I learned the hard way after deadsticking to a landing in a 182 many moons ago following an engine failure IMC. I landed on a gravel strip that was beneath me when I emerged from the higher cloud bases, but to this day am not impressed in the least with the idea of flying single engine instruments, especially in piston equipment.