I don't want to discourage you from trying these things, of course. Just have a healthy skepticism. In the end, trying for yourself is often the best way to figure things out when it comes to this stuff, because there is very little in the way of objective data out there. Just work with it yourself and decide if you like it. Pyrocat is probably a good one to try because it seems it is more forgiving and flexible than some other staining developers. Something to keep in mind: Don't try to evaluate stained negatives by eye, because you're really only seeing the silver density, not the additional stain density the paper will "see". Even densitometry is less than straight forward. So make prints. A stained negative that looks too thin and low in contrast might print just right.