IMHO, you are making things unnecessarily complicated. I suggest that you buy a 2.5 l Tetenal E6 kit. Although, it's a 3-bath kit, it has proven itself over many years to produce excellent results. Some Apug members even prefer the results to those of the Fuji chemicals, and it is very convenient to use. Why not do your own experiment: process a roll of film with the Tetenal kit. Then process a second one, using C41 bleach and fix instead of the blix. Compare the results. If you are convinced that the second roll turned out better, you can continue using the C41 bleach and fix, just as you were planning to do with the Arista kit.
I cannot comment on the quality of the Arista kit, as I don't have any experience with it. I only know that most Apuggers (including myself) who have used the Tetenal kit are 100% satisfied - and we're a very critical bunch! I know PE and others maintain that a 3-step process cannot work as well as the "full" E6 process. But PE himself has said numerous times that you must do whatever works for you.
(BTW PE, I'm very glad that your old (or rather, young) picture is back!)