It's a tradeoff.
There are some good points discussed here.
When I bench a film, I get as close as I can with a non hypo'ed developer. This goes as far as using a 1:1 mixture of dektol. I get it close, and then start adding various levels of hypo. This is also why I use a stock solution of hypo and only add it at development time; the optimum levels are different with each film and I don't like to stick with one film. The thing is, hypo is a general solvent. It will remove and lower your dmax too. The right amount is important and not developing enough is counter productive. using a weaker developer (like rodinal, d76, ..etc) will yield "thin chromes" or be too fogged or just too expensive on developer use.
Sometimes I use a selenium toner for a final bath. This helps thicken the image when you can't build up enough silver. Most traditional processes to "fix" negs still apply.
Ideally, you want a developer with ph 10 or greater to give you the activity you need. What you need to develop negs well is not what you need to develop chromes well. I have been playing with some concoctions targeting this. So far it's good, but dektol seems to get the best results for me.
@johnielvis: what a great story! I agree with you 100%.
It's still weird that some people get different results with exactly the same set ups, distilled water, etc. I mean for example processing of Fomapan reversal : I cannot get a transparent base without use of KSCN, although many forumers all over the world can (there are others who can't, as well). This stays a mystery. The problem has a solution, but well, what's the reason for such differences if really all factors are fixed ? Besides, KSCN doesn't necessary cause loss of density, or ''quality'' (whatever that means to you), it depends on the concentration used. Images speak for itselves (even though telecine is crappy) : Fomapan R100, exposed 100ASA processed in Dokumol 1+9, 5g/L KSCN, 20C, 13 min : https://vimeo.com/68006498
Will try Eukobrom for less contrast, I guess.
Tonite I've made another attempt in my never-ending quest.
This time I've reduced the Pq Universal to 1+9, 9 minutes, Kodak style inversions, 20°C, plus 0,3g/300ml hypo.
Bleach and clear as usual.
Then Iron Out 2 teaspoons in 300ml distilled water for 6 minutes.
Then Kodak Rapid Selenium Toner 10ml/300ml for 10 minutes.
Fomapan 100 classic reacts to this with a light chocholate red brown hue, very interesting. It's not red, it's not warm toned.
The selenium toner has counteracted the light image caused by the hypo and added much contrast. The DMax is finally there, can't get better than this. I must project the images to have the final say.
To me it looks just fine, there are no burnt highlights (except one overexposed scene in the snow) and the blacks are black, to me. Anyway, the results are better by far with KSCN than without, so I don't have much choice...
PS : if you look at the thumbnail of the video, the part on the guy, under the bag, on his back, is as black as the sides :p